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CRITICAL: Blazor Server Circuit ObjectDisposedException causing application crashes with LeptonX Theme #10283
Answer

I put the suggested change into the Blazor project. But should have put in the Blazor.Client project:

private void ConfigureSyncfusion(ServiceConfigurationContext context)
{
    // Add Syncfusion services
    context.Services.AddSyncfusionBlazor();
    
    context.Services.Replace(ServiceDescriptor.Transient<IComponentActivator, ServiceProviderComponentActivator>());
}

It is now in the Blazor.Client project and yes, may have resolved the issue.
The logs file no longer has the System.ObjectDisposedException type messages.

Thank you!

CRITICAL: Blazor Server Circuit ObjectDisposedException causing application crashes with LeptonX Theme #10283
Answer

After add this to ...BlazorModule.cs ConfigureSyncfusion(context);

public override void ConfigureServices(ServiceConfigurationContext context) { ..... context.Services.Replace(ServiceDescriptor.Transient<IComponentActivator, ServiceProviderComponentActivator>());

NullReferenceException: Object reference not set to an instance of an object. Volo.Abp.AspNetCore.Components.Web.Theming.Layout.PageHeader.OnParametersSetAsync() }

This is what the browser shows (i.e. no page is rendered):

Stack Query Cookies Headers Routing NullReferenceException: Object reference not set to an instance of an object. Volo.Abp.AspNetCore.Components.Web.Theming.Layout.PageHeader.OnParametersSetAsync() Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task) Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync() Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters) Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(ref DiffContext diffContext, int frameIndex) Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(ref DiffContext diffContext, int frameIndex) Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(ref DiffContext diffContext, int newFrameIndex) Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(ref DiffContext diffContext, int oldStartIndex, int oldEndIndexExcl, int newStartIndex, int newEndIndexExcl) Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, int componentId, ArrayRange<RenderTreeFrame> oldTree, ArrayRange<RenderTreeFrame> newTree) Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, out Exception renderFragmentException) Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue() Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue() Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(int componentId, RenderFragment renderFragment) Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged() Microsoft.AspNetCore.Components.ComponentBase.CallOnParametersSetAsync() Microsoft.AspNetCore.Components.ComponentBase.RunInitAndSetParametersAsync() Microsoft.AspNetCore.Components.Rendering.ComponentState.SetDirectParameters(ParameterView parameters) Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderRootComponentAsync(int componentId, ParameterView initialParameters) Microsoft.AspNetCore.Components.HtmlRendering.Infrastructure.StaticHtmlRenderer.BeginRenderingComponent(IComponent component, ParameterView initialParameters) Microsoft.AspNetCore.Components.Endpoints.EndpointHtmlRenderer.RenderEndpointComponent(HttpContext httpContext, Type rootComponentType, ParameterView parameters, bool waitForQuiescence) System.Runtime.CompilerServices.ValueTaskAwaiter<TResult>.GetResult() Microsoft.AspNetCore.Components.Endpoints.RazorComponentEndpointInvoker.RenderComponentCore(HttpContext context) Microsoft.AspNetCore.Components.Endpoints.RazorComponentEndpointInvoker.RenderComponentCore(HttpContext context) Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext+<>c+<<InvokeAsync>b__10_0>d.MoveNext() Microsoft.AspNetCore.Builder.ServerRazorComponentsEndpointConventionBuilderExtensions+<>c__DisplayClass1_1+<<AddInteractiveServerRenderMode>b__1>d.MoveNext() Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|7_0(Endpoint endpoint, Task requestTask, ILogger logger) Volo.Abp.AspNetCore.Serilog.AbpSerilogMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+InterfaceMiddlewareBinder+<>c__DisplayClass2_0+<<CreateMiddleware>b__0>d.MoveNext() Volo.Abp.AspNetCore.Auditing.AbpAuditingMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Volo.Abp.AspNetCore.Auditing.AbpAuditingMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+InterfaceMiddlewareBinder+<>c__DisplayClass2_0+<<CreateMiddleware>b__0>d.MoveNext() Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext) Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider) Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context) Volo.Abp.AspNetCore.Security.Claims.AbpDynamicClaimsMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+InterfaceMiddlewareBinder+<>c__DisplayClass2_0+<<CreateMiddleware>b__0>d.MoveNext() Volo.Abp.AspNetCore.Uow.AbpUnitOfWorkMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+InterfaceMiddlewareBinder+<>c__DisplayClass2_0+<<CreateMiddleware>b__0>d.MoveNext() Volo.Abp.AspNetCore.ExceptionHandling.AbpExceptionHandlingMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Volo.Abp.AspNetCore.ExceptionHandling.AbpExceptionHandlingMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+InterfaceMiddlewareBinder+<>c__DisplayClass2_0+<<CreateMiddleware>b__0>d.MoveNext() Volo.Abp.AspNetCore.MultiTenancy.MultiTenancyMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+InterfaceMiddlewareBinder+<>c__DisplayClass2_0+<<CreateMiddleware>b__0>d.MoveNext() Microsoft.AspNetCore.Builder.ApplicationBuilderAbpOpenIddictMiddlewareExtension+<>c__DisplayClass0_0+<<UseAbpOpenIddictValidation>b__0>d.MoveNext() Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context) Volo.Abp.AspNetCore.Security.AbpSecurityHeadersMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+InterfaceMiddlewareBinder+<>c__DisplayClass2_0+<<CreateMiddleware>b__0>d.MoveNext() Volo.Abp.AspNetCore.Tracing.AbpCorrelationIdMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+InterfaceMiddlewareBinder+<>c__DisplayClass2_0+<<CreateMiddleware>b__0>d.MoveNext() Microsoft.AspNetCore.ResponseCompression.ResponseCompressionMiddleware.InvokeCore(HttpContext context) Microsoft.AspNetCore.Localization.RequestLocalizationMiddleware.Invoke(HttpContext context) Microsoft.AspNetCore.RequestLocalization.AbpRequestLocalizationMiddleware.InvokeAsync(HttpContext context, RequestDelegate next) Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+InterfaceMiddlewareBinder+<>c__DisplayClass2_0+<<CreateMiddleware>b__0>d.MoveNext() Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

CRITICAL: Blazor Server Circuit ObjectDisposedException causing application crashes with LeptonX Theme #10283
Answer

Thank you. I will give that a try.

CRITICAL: Blazor Server Circuit ObjectDisposedException causing application crashes with LeptonX Theme #10283
Answer

AI assessment of the full log file is:

Root Cause Analysis Primary Issue: ObjectDisposedException - Autofac LifetimeScope has been disposed while components are still trying to resolve dependencies. Trigger Point: The exceptions originate from ABP Framework's LeptonX Theme components (Breadcrumbs and ContentToolbar) during their initialization phase, specifically in property change event handlers that trigger StateHasChanged(). Key Problem Pattern The crash follows this sequence:

  1. PropertyChanged event fires in Breadcrumbs.<OnInitializedAsync>b__8_1 and ContentToolbar.<OnInitializedAsync>b__7_1
  2. StateHasChanged() is called, triggering a re-render
  3. Syncfusion components try to instantiate via SfComponentActivator.CreateInstance()
  4. Autofac attempts resolution from a disposed LifetimeScope
  5. Fatal exception - Application terminates (IsTerminating: true) Likely Causes
  6. Component lifecycle mismatch: Layout components are subscribing to events but not properly unsubscribing, causing events to fire after their scope is disposed
  7. Asynchronous rendering race condition: Navigation or circuit disposal happening while async initialization is still in progress
  8. Syncfusion + Autofac integration issue: Custom activator attempting to resolve from incorrect scope
CRITICAL: Blazor Server Circuit ObjectDisposedException causing application crashes with LeptonX Theme #10283
Answer

Here is a snippet of the log file when the crash occurs. See the actvitiy before the [FTL] FATAL event. But I think it would be better to email the full log file for a better picture. I've pasted the max allowed.

  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange`1 oldTree, ArrayRange`1 newTree)
  at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
--- End of stack trace from previous location ---
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(Int32 componentId, RenderFragment renderFragment)
  at Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged()
  at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<InvokeAsync>g__Execute|8_0(ValueTuple`3 state)
--- End of stack trace from previous location ---
  at Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Components.ApplicationLayout.Common.ContentToolbar.&lt;OnInitializedAsync&gt;b__7_1(Object s, PropertyChangedEventArgs e)
  at System.Threading.Tasks.Task.&lt;&gt;c.&lt;ThrowAsync&gt;b__128_1(Object state)
  at System.Threading.QueueUserWorkItemCallback.Execute()
  at System.Threading.ThreadPoolWorkQueue.Dispatch()
  at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
2026-01-13 10:08:43.379 +11:00 [FTL] FATAL: Unhandled exception in AppDomain. IsTerminating: true
System.ObjectDisposedException: Instances cannot be resolved and nested lifetimes cannot be created from this LifetimeScope as it (or one of its parent scopes) has already been disposed.
  at Autofac.Core.Lifetime.LifetimeScope.ThrowDisposedException()
  at Autofac.Core.Lifetime.LifetimeScope.ResolveComponent(ResolveRequest& request)
  at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable`1 parameters, Object& instance)
  at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext context, Service service, IEnumerable`1 parameters)
  at Syncfusion.Blazor.SfComponentActivator.CreateInstance(Type componentType)
  at Microsoft.AspNetCore.Components.ComponentFactory.InstantiateComponent(IServiceProvider serviceProvider, Type componentType, IComponentRenderMode callerSpecifiedRenderMode, Nullable`1 parentComponentId)
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(RenderTreeFrame[] frames, Int32 frameIndex, Int32 parentComponentId)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(DiffContext& diffContext, Int32 frameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange`1 oldTree, ArrayRange`1 newTree)
  at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
--- End of stack trace from previous location ---
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(Int32 componentId, RenderFragment renderFragment)
  at Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged()
  at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<InvokeAsync>g__Execute|8_0(ValueTuple`3 state)
--- End of stack trace from previous location ---
  at Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Components.ApplicationLayout.Common.Breadcrumbs.&lt;OnInitializedAsync&gt;b__8_1(Object s, PropertyChangedEventArgs e)
  at System.Threading.Tasks.Task.&lt;&gt;c.&lt;ThrowAsync&gt;b__128_1(Object state)
  at System.Threading.QueueUserWorkItemCallback.Execute()
  at System.Threading.ThreadPoolWorkQueue.Dispatch()
  at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
2026-01-13 10:08:43.379 +11:00 [FTL] FATAL: Unhandled exception in AppDomain. IsTerminating: true
System.ObjectDisposedException: Instances cannot be resolved and nested lifetimes cannot be created from this LifetimeScope as it (or one of its parent scopes) has already been disposed.
  at Autofac.Core.Lifetime.LifetimeScope.ThrowDisposedException()
  at Autofac.Core.Lifetime.LifetimeScope.ResolveComponent(ResolveRequest& request)
  at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable`1 parameters, Object& instance)
  at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext context, Service service, IEnumerable`1 parameters)
  at Syncfusion.Blazor.SfComponentActivator.CreateInstance(Type componentType)
  at Microsoft.AspNetCore.Components.ComponentFactory.InstantiateComponent(IServiceProvider serviceProvider, Type componentType, IComponentRenderMode callerSpecifiedRenderMode, Nullable`1 parentComponentId)
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(RenderTreeFrame[] frames, Int32 frameIndex, Int32 parentComponentId)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(DiffContext& diffContext, Int32 frameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange`1 oldTree, ArrayRange`1 newTree)
  at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
--- End of stack trace from previous location ---
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(Int32 componentId, RenderFragment renderFragment)
  at Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged()
  at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<InvokeAsync>g__Execute|8_0(ValueTuple`3 state)
--- End of stack trace from previous location ---
  at Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Components.ApplicationLayout.Common.ContentToolbar.&lt;OnInitializedAsync&gt;b__7_1(Object s, PropertyChangedEventArgs e)
  at System.Threading.Tasks.Task.&lt;&gt;c.&lt;ThrowAsync&gt;b__128_1(Object state)
  at System.Threading.QueueUserWorkItemCallback.Execute()
  at System.Threading.ThreadPoolWorkQueue.Dispatch()
  at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
2026-01-13 10:08:43.379 +11:00 [FTL] FATAL: Unhandled exception in AppDomain. IsTerminating: true
System.ObjectDisposedException: Instances cannot be resolved and nested lifetimes cannot be created from this LifetimeScope as it (or one of its parent scopes) has already been disposed.
  at Autofac.Core.Lifetime.LifetimeScope.ThrowDisposedException()
  at Autofac.Core.Lifetime.LifetimeScope.ResolveComponent(ResolveRequest& request)
  at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable`1 parameters, Object& instance)
  at Autofac.ResolutionExtensions.ResolveOptionalService(IComponentContext context, Service service, IEnumerable`1 parameters)
  at Syncfusion.Blazor.SfComponentActivator.CreateInstance(Type componentType)
  at Microsoft.AspNetCore.Components.ComponentFactory.InstantiateComponent(IServiceProvider serviceProvider, Type componentType, IComponentRenderMode callerSpecifiedRenderMode, Nullable`1 parentComponentId)
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.InstantiateChildComponentOnFrame(RenderTreeFrame[] frames, Int32 frameIndex, Int32 parentComponentId)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewComponentFrame(DiffContext& diffContext, Int32 frameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InitializeNewSubtree(DiffContext& diffContext, Int32 frameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.InsertNewFrame(DiffContext& diffContext, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForFramesWithSameSequence(DiffContext& diffContext, Int32 oldFrameIndex, Int32 newFrameIndex)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.AppendDiffEntriesForRange(DiffContext& diffContext, Int32 oldStartIndex, Int32 oldEndIndexExcl, Int32 newStartIndex, Int32 newEndIndexExcl)
  at Microsoft.AspNetCore.Components.RenderTree.RenderTreeDiffBuilder.ComputeDiff(Renderer renderer, RenderBatchBuilder batchBuilder, Int32 componentId, ArrayRange`1 oldTree, ArrayRange`1 newTree)
  at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment, Exception& renderFragmentException)
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
--- End of stack trace from previous location ---
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()
  at Microsoft.AspNetCore.Components.RenderTree.Renderer.AddToRenderQueue(Int32 componentId, RenderFragment renderFragment)
  at Microsoft.AspNetCore.Components.ComponentBase.StateHasChanged()
  at Microsoft.AspNetCore.Components.Rendering.RendererSynchronizationContext.<InvokeAsync>g__Execute|8_0(ValueTuple`3 state)
--- End of stack trace from previous location ---
  at Volo.Abp.AspNetCore.Components.Web.LeptonXTheme.Components.ApplicationLayout.Common.ContentToolbar.&lt;OnInitializedAsync&gt;b__7_1(Object s, PropertyChangedEventArgs e)
  at System.Threading.Tasks.Task.&lt;&gt;c.&lt;ThrowAsync&gt;b__128_1(Object state)
  at System.Threading.QueueUserWorkItemCallback.Execute()
  at System.Threading.ThreadPoolWorkQueue.Dispatch()
  at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
CRITICAL: Blazor Server Circuit ObjectDisposedException causing application crashes with LeptonX Theme #10283
Answer

On further investigation it seems it may be related to the Syncfusion Blazor Grid and Kanban components we are using. I will log a ticket with Syncfusion to see if it is a known issue for them.

CRITICAL: Blazor Server Circuit ObjectDisposedException causing application crashes with LeptonX Theme #10283
Answer

We have reviewed support cases #6280 and #5289 which describe identical issues. We've implemented the recommended workarounds: • Increased DisconnectedCircuitRetentionPeriod to 30 minutes • Increased DisconnectedCircuitMaxRetained to 1000 • Added circuit handler with ObjectDisposedException catching • Increased Hub timeout intervals However, our application is still experiencing fatal crashes (application process termination with IsTerminating: true). The exceptions are occurring on background threads from LeptonX theme component event handlers, NOT in the circuit inbound activity pipeline. Specific question: Are there any updates or patches since cases #6280 and #5289 were closed? Our crash pattern suggests the issue extends beyond what the circuit handler can catch.

CRITICAL: Blazor Server Circuit ObjectDisposedException causing application crashes with LeptonX Theme #10283
Question

Are there any updates or patches since cases #6280 and #5289 were closed? Our crash pattern suggests the issue extends beyond what the circuit handler can catch.

Returning User 403 - Forbidden: Access is denied. #9753
Answer

Ok, the database size issue has been sorted.
Can you log in then log out to experience the 403 - Forbidden: Access is denied.

Thanks!

Returning User 403 - Forbidden: Access is denied. #9753
Answer

Can you expand on the suggested Ensure Claims/Permissions Are Refreshed: Where should this code go?

I can replicate this each time I choose logout from the top right menu:

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