Issue After Reverting from SaaS Source Code to Package Reference – ITenantAppService Not Registered #8758

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• ABP Framework version: vv8.0.3
• UI Type: Blazor Server
• Database System: EF Core (SQL Server)
• Tiered (for MVC) or Auth Server Separated (for Angular): no
• Exception message and full stack trace:
• Steps to reproduce the issue:

We are using ABP Commercial with Blazor Server and recently attempted to switch from the NuGet-based SaaS module (Volo.Saas) to the full source code version. However, we decided to revert back to the SaaS package reference.

After completing the migration back to Volo.Saas, we ensured all csproj and Module.cs files were correctly updated, and the solution builds without errors. The only difference in the Saas packages is that we were at Abp 8.0.2 when doing the initial switch to source code, now we are at 8.0.3. However, when logging into the host page, we get the following runtime error:

[2025-02-06T09:12:22.398Z] Error: System.InvalidOperationException: Cannot provide a value for property 'TenantAppService' on type 'Volo.Saas.Host.Blazor.Pages.Shared.Components.SaasLatestTenantsWidget.SaasLatestTenantsWidgetComponent'. There is no registered service of type 'Volo.Saas.Host.ITenantAppService'. at Microsoft.AspNetCore.Components.ComponentFactory.<>c__DisplayClass9_0.<CreatePropertyInjector>g__Initialize|1(IServiceProvider serviceProvider, IComponent component) 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.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()  

Despite reverting to Volo.Saas, ITenantAppService is not being registered, causing an injection failure in Blazor components. Removing the widget lets us try navigate to the Editions section and there the we get this error:

System.InvalidOperationException: Cannot provide a value for property 'AppService' on type 'Volo.Saas.Host.Blazor.Pages.Saas.Host.EditionManagement'. There is no registered service of type 'Volo.Saas.Host.IEditionAppService'.

Could you clarify why ITenantAppService and IEditionAppService is not available after switching back to the SaaS package reference? Are there additional dependencies we may have missed? Do we need to manually reset or reconfigure something? Is this a known issue when reverting from source code to package reference?

Any help or guidance on how to resolve this issue would be greatly appreciated. Thanks!