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• AddEntityCache<TEntity, TKey>() is just a DI registration for IEntityCache<,>, so it should be placed in the module that defines/owns the entity (the bounded context/module where TEntity lives) and that is always included in your application.

  • In a typical layered solution, that means: YourProjectDomainModule (or a dedicated YourProjectDomainCachingModule if you prefer to keep registrations separated).
  • Reason: the cache is part of the domain’s read model optimization for that entity and should be available wherever the domain is used (HTTP API host, workers, tests, etc.) without duplicating registrations.

• Do not put it into the EntityFrameworkCore module unless you have a very specific reason.

  • The entity cache is not an EF Core mapping/DbContext concern; it’s an application-wide service.
  • Registering it in the EFCore module can also lead to “it works only when EFCore module is referenced” coupling.

• Do not put it into the Host module as the primary place.

  • Host is composition root; keeping the registration there makes the cache unavailable in other hosts (e.g., a background worker host) unless you remember to duplicate it.

• If you consume IEntityCache<TEntity, TKey> from the Domain layer, registering it in the Domain module is the right choice (so the domain package guarantees that the cache service exists when the domain is used). The consuming layer doesn’t need to care where it’s registered as long as the module dependency chain includes the module that registers it.

Example placement:

using Microsoft.Extensions.DependencyInjection;
using Volo.Abp.Modularity;

namespace MyCompany.MyProject;

public class MyProjectDomainModule : AbpModule
{
    public override void ConfigureServices(ServiceConfigurationContext context)
    {
        context.Services.AddEntityCache<Product, Guid>();
        // context.Services.AddEntityCache<OtherEntity, int>();
    }
}

• Sources:
  • https://abp.io/docs/latest/framework/infrastructure/entity-cache
  • https://abp.io/docs/10.0//framework/infrastructure/entity-cache

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• Your JSON shows two different configuration shapes, but the one ABP’s Azure Event Bus expects is under Azure:EventBus, not top-level EventBus, and not Abp:EventBus:Azure (in your version/module).

• That’s why ABP still ends up with topicName = null at startup: it’s not reading the keys you think it is.

Use this exact section (and remove the others to avoid confusion):

{
  "Azure": {
    "ServiceBus": {
      "Connections": {
        "Default": {
          "ConnectionString": "Endpoint=sb://...;SharedAccessKeyName=...;SharedAccessKey=..."
        }
      }
    },
    "EventBus": {
      "ConnectionName": "Default",
      "SubscriberName": "email-subscription",
      "TopicName": "notification-event"
    }
  }
}

Then delete these sections entirely (they are not used by Volo.Abp.EventBus.Azure initialization and can mislead you during troubleshooting):

"EventBus": { ... },
"Abp": { "EventBus": { "Azure": { ... } } }

Also, in your posted config you have:

"ConnectionString": ""

Even after fixing TopicName, you will fail later because the connection string is empty. Put a real Azure Service Bus connection string there.

If you want the host to start without Azure Service Bus at all (e.g., in local dev), you must remove the dependency on Volo.Abp.EventBus.Azure / AbpEventBusAzureModule from that host; otherwise ABP will always try to initialize it on startup.

(Validated reference relevant to Azure Service Bus EventBus config format used by ABP support)

• https://abp.io/support/questions/2334

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• The exception is thrown by ABP Azure Service Bus distributed event bus initialization because ABP is trying to create an AzureServiceBusMessageConsumer with a null topicName:

AzureServiceBusMessageConsumer.Initialize(String topicName, String subscriptionName, String connectionName)
  ...
  ArgumentNullException: Value cannot be null. (Parameter 'topicName')

So your host app is starting with Volo.Abp.EventBus.Azure enabled, but the Azure EventBus TopicName is not configured (or not being read).

• Fix: add (or correct) the Azure Service Bus EventBus configuration in the startup project that crashes (e.g., HttpApi.Host, AuthServer, etc.) appsettings.json / environment-specific file:

{
    "Azure": {
      "ServiceBus": {
        "Connections": {
          "Default": {
            "ConnectionString": "Endpoint=sb://<yournamespace>.servicebus.windows.net/;SharedAccessKeyName=...;SharedAccessKey=..."
          }
        }
      },
      "EventBus": {
        "ConnectionName": "Default",
        "SubscriberName": "<YourApp_Subscriber>",
        "TopicName": "<YourTopicName>"
      }
    }
  }

Notes (based on how ABP initializes the consumer):

• Azure:EventBus:TopicName must be non-empty.

• Azure:EventBus:SubscriberName is also required for subscriptions (keep it non-empty).

• Azure:EventBus:ConnectionName must match a key under Azure:ServiceBus:Connections.

• Also ensure you are not accidentally “losing” config values due to environment overrides:

  • If you have appsettings.Development.json, appsettings.Production.json, Kubernetes env vars, etc., confirm none of them overwrite Azure:EventBus:TopicName with an empty value.
  • Confirm you are running the correct project and it has the correct config file copied to output.

• If you don’t intend to use Azure Service Bus in this host, remove/disable the Azure event bus module from that host’s module dependencies (so AbpEventBusAzureModule doesn’t run). Otherwise ABP will always try to initialize it during application startup.

Sources (validated):

• https://abp.io/support/questions/2334

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• What you want is PathBase / virtual directory hosting for each app in a tiered MVC solution:

  • AuthServer: https://localhost:44318/auth
  • HttpApi.Host: https://localhost:44392/portal/api
  • Web (MVC UI): https://localhost:44374/portal

• In ABP (including v9.3.6), the reliable way to do this is:

  1. Set PathBase (ASP.NET Core UsePathBase) for each application.
  2. Ensure ABP-generated URLs are correct by setting SelfUrl (and the relevant remote service base URLs) to include the same base path.
  3. Update OpenIddict client redirect/logout URLs (seed data / DbMigrator / appsettings) to include /portal/... and /auth/....
  4. Make sure cookies work with these base paths (cookie path considerations).

1) AuthServer at /auth

In AuthServer (YourProject.AuthServer) add PathBase early in the pipeline:

// in OnApplicationInitialization / Program.cs pipeline
app.UsePathBase("/auth");

Then set AuthServer self URL accordingly in appsettings.json:

"App": {
  "SelfUrl": "https://localhost:44318/auth"
}

Also ensure the OIDC issuer/authority used by clients points to:

• https://localhost:44318/auth

2) HttpApi.Host at /portal/api

In HttpApi.Host add:

app.UsePathBase("/portal/api");

Set:

"App": {
  "SelfUrl": "https://localhost:44392/portal/api"
}

If your MVC UI calls this API via remote services, set the remote service base URL (commonly in Web project) to include /portal/api.

3) MVC Web at /portal

In Web (MVC UI) add:

app.UsePathBase("/portal");

Set:

"App": {
  "SelfUrl": "https://localhost:44374/portal"
}

And update the AuthServer authority used by Web:

"AuthServer": {
  "Authority": "https://localhost:44318/auth",
  "RequireHttpsMetadata": "false"
}

4) Update OpenIddict client redirect URIs (critical)

Because you changed the base paths, the redirect endpoints change too:

• Web redirect URI becomes:
  • https://localhost:44374/portal/signin-oidc
• Web post logout redirect becomes:
  • https://localhost:44374/portal/signout-callback-oidc
• Swagger redirect (if used on API) becomes:
  • https://localhost:44392/portal/api/swagger/oauth2-redirect.html

So you must update your OpenIddict application/client configuration in the database (or via ABP data seeding / DbMigrator configuration) to use the new URLs.

5) Notes about “meeting”

For non-technical requests like arranging a meeting, please contact us at:

• https://abp.io/contact

(sources)

• https://abp.io/docs/latest/solution-templates/layered-web-application/solution-structure
• https://abp.io/support/questions/1048
• https://abp.io/contact

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• ABP Suite does not automatically include base-class properties (like auditing fields) into the generated DTOs/pages, and there is currently no option in Suite UI to “select built-in/base properties” for generation. So your understanding is correct: if you want to show something like an entity’s creation time in the UI, you need to model it on the DTO/UI side as well.
• The ABP way to avoid repeating these common properties across your DTOs is to use ABP’s standard DTO base classes that already contain them.

What to do (recommended, minimal manual work)

1. Make your entity audited (if it isn’t already) Use an audited base entity such as AuditedAggregateRoot<TKey> / FullAuditedAggregateRoot<TKey> (or their non-aggregate variants), so the entity actually has the audit properties.

2. Change the generated DTO base class to an audited DTO Instead of inheriting from EntityDto<TKey>, inherit from one of:

• AuditedEntityDto<TKey> (includes CreationTime, CreatorId, LastModificationTime, LastModifierId)
• FullAuditedEntityDto<TKey> (adds DeletionTime, DeleterId, IsDeleted)

Example:

using System;
using Volo.Abp.Application.Dtos;

public class MyEntityDto : AuditedEntityDto<Guid>
{
    // your custom properties...
    // CreationTime is already available from AuditedEntityDto<Guid>
}

3. Ensure your AutoMapper mapping exists Your mapping CreateMap<MyEntity, MyEntityDto>() will map CreationTime automatically as long as the DTO has that property via the base class.

4. Add the column/field in the UI

• MVC/Razor UI: add a column in the generated DataTable / table definition for creationTime.
• Angular UI: add a column in the list component for creationTime. This is usually the only “UI-layer” manual step you need once the DTO exposes the property.

Notes about naming

In ABP, the auditing property is typically named CreationTime (not CreatedTime). So if you were looking for CreatedTime, you won’t see it unless you created your own property. Use CreationTime in DTO/UI.

Sources

• https://abp.io/docs/latest/framework/architecture/domain-driven-design/data-transfer-objects
• https://docs.abp.io/en/commercial/latest/abp-suite/index
• https://abp.io/docs/latest/suite/customizing-the-generated-code

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Please use the official support ticket page to continue with ticket #10312 (add the requested details/logs, follow up with replies, or ask for status updates). I can’t access or act on tickets from here, and ABP support staff can only continue the process inside that ticket thread.

If you need to escalate or you’ve run out of question credits / need account-level help, contact ABP via:

• https://abp.io/contact

(Your ticket link is reachable: https://abp.io/support/questions/10312/Error-when-Save-and-Generate-Class-with-Abp-Suite)

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• In the microservice template, creating a tenant in SaaS does not directly create the tenant’s Identity admin user/role in the Identity DB. Instead, SaaS publishes a distributed event (outbox), and the Identity service is expected to consume it and then run the tenant migration + data seeding for that new tenant (admin role/user creation happens during that seed).
• Your SaaS pod log shows: “Found 1 events in the outbox. Sent 1 events to message broker”. That means the SaaS side is doing its part. The missing users/roles in CloverleafCMS_PR_Identity indicates the consumer side (Identity service) is not processing the tenant-created event, or it processes it but the seed/migration fails (often with a DB connection/timeout issue in production).

What to do (production-accurate checklist)

1. Check Identity service logs right after tenant creation

   • You should see logs about handling the tenant-created event and running migration/seeding for the new tenant.
   • If you see nothing, the Identity service is not subscribed/consuming (message broker / consumer / inbox issue).

2. Verify the distributed event infrastructure is healthy

   • Since SaaS says it sent the event, check:
     • Message broker connectivity/credentials for Identity service (RabbitMQ/Kafka, etc.).
     • Consumer is enabled and running in the Identity pod.
   • If you use inbox/outbox tables, also check Identity’s inbox background worker health (if enabled).

3. Most common real cause in production: seeding/migration fails due to DB connection/timeout

   • When seeding cannot complete, ABP won’t create the tenant admin user.
   • Check production error logs around tenant creation time for SQL timeouts, connection string resolution issues, or migration failures.

4. If you are using “shared database” (no per-tenant connection string)

   • There is a known/previously-reported issue pattern where tenant seeding can fail depending on how the unit of work is started during tenant migration/seed flow (especially around connection string resolution / timeouts).
   • See the discussion and workaround notes in the support thread below.

5. Confirm tenant DB (or schemas) are created/migrated and seed completed

   • ABP’s KB explicitly points out that inability to login / missing tenant admin typically means tenant seeding didn’t complete; you must check the logs for the seeding process.

Sources

• https://abp.io/docs/latest/kb/can-not-login-with-admin-user
• https://abp.io/support/questions/2240

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• In ABP 9.0.x (Angular + OpenIddict), domain/subdomain tenant resolution commonly breaks the OIDC code flow unless you also enable wildcard domain support for OpenIddict and ensure the issuer/redirect/cors/client configuration matches the tenant-specific domain(s). Symptoms are exactly what you described: infinite login loop (Angular keeps trying to complete code flow but token/config validation fails) or tenant login works for host only.

• The community article you followed includes the key ABP-side requirement (wildcard support) via AbpOpenIddictWildcardDomainOptions. You must apply it in ABP 9.0.4 too (in your *.HttpApi.Host module), and you must also make sure your client URLs / redirect allowed URLs / CORS origins are compatible with subdomains.

1) Backend (HttpApi.Host): enable wildcard domain support + domain tenant resolver

In your HttpApiHostModule (ABP 9.0.4), configure both:

using Volo.Abp.MultiTenancy;
using Volo.Abp.OpenIddict.WildcardDomains;

public override void PreConfigureServices(ServiceConfigurationContext context)
{
    PreConfigure<AbpOpenIddictWildcardDomainOptions>(options =>
    {
        options.EnableWildcardDomainSupport = true;

        // IMPORTANT: Add formats matching your real UI domain(s)
        // Example (production):
        options.WildcardDomainsFormat.Add("https://{0}.dentpalqaaumtech.org");

        // Example (local):
        // options.WildcardDomainsFormat.Add("http://{0}.multitenancydemo.local:4200");
    });
}

public override void ConfigureServices(ServiceConfigurationContext context)
{
    Configure<AbpTenantResolveOptions>(options =>
    {
        options.AddDomainTenantResolver("{0}.dentpalqaaumtech.org");
        // local example: options.AddDomainTenantResolver("{0}.multitenancydemo.local");
    });
}

If your localhost custom domain testing is done over HTTP, you must also disable the transport security requirement for OpenIddict server in DEBUG (as shown in the article), otherwise the flow will fail/loop:

#if DEBUG
PreConfigure<OpenIddictServerBuilder>(options =>
{
    options.UseAspNetCore().DisableTransportSecurityRequirement();
});
#endif

2) Angular: baseUrl/redirectUri must use {0} pattern (and HTTPS requirement must match)

Your Angular environment.ts (or dynamic env) must match the tenant domain pattern you use:

• application.baseUrl should be https://{0}.dentpalqaaumtech.org (or your localhost domain pattern)
• oAuthConfig.redirectUri should usually be the same baseUrl pattern
• If you are testing locally with http, set requireHttps: false

This is required so Angular computes tenant context correctly from the URL and completes the code flow without bouncing.

3) Production/deployed: fix “host works but tenant users can’t login”

This almost always indicates redirect uri / CORS / authority mismatch between:

• the URL the browser is on (https://tenant1.dentpalqaaumtech.org)
• what the auth server thinks is valid (RedirectAllowedUrls, client redirect URIs, CORS origins)
• and OpenIddict issuer validation across subdomains (wildcard support)

Ensure your appsettings.json has tenant-compatible entries (examples):

• App:SelfUrl should be the actual backend URL (not tenant-subdomain unless you truly host backend per-tenant)
• App:CorsOrigins should include your tenant subdomain pattern as supported by ABP’s wildcard cors helpers (don’t invent formats OpenIddict/ABP can’t parse)
• App:RedirectAllowedUrls must include tenant UI domains that will receive the authorization code callback (e.g. https://*.dentpalqaaumtech.org style rules depending on your setup)

Also, after changing these, run DbMigrator (or otherwise update OpenIddict/clients in DB) so redirect URI/cors/client settings are not stale.

4) Why you see an infinite loop specifically

In ABP Angular, the app will try to exchange the code for tokens and then load the application configuration. If issuer/redirect/CORS/wildcard-domain support is not correctly aligned for the tenant domain, the exchange/config call fails, and Angular navigates back to login again → loop.

This behavior is consistent with ABP support cases where a misconfigured OpenIddict certificate or issuer also causes loops, but in domain-tenant scenarios the most frequent root cause is missing wildcard domain support and/or mismatched allowed redirect/CORS/client settings.

Sources (validated)

• https://abp.io/community/articles/how-to-use-domainbased-tenant-resolver-in-abp-with-angular-and-openiddict-v9y8da7v
• https://abp.io/docs/latest/framework/ui/angular/multi-tenancy

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• This popup is ABP Angular’s global HTTP error handler. On the very first full page load, the Angular UI makes a call to AbpApplicationConfigurationAppService.GetAsync() (application configuration endpoint). If that call fails (typically 401/403/500 or a blocked request), ABP shows the generic modal “An error has occurred! Error detail not sent by server.”.
• In Azure Web App deployments, the most common reason this happens only on the first load is that the very first request from the browser is being redirected or blocked (e.g., HTTP→HTTPS redirect, missing SPA rewrite, missing/incorrect CORS/AllowedHosts, or a proxy/WAF stripping ABP error details). The follow-up request then succeeds (cached config/token/cookies already set), so it “magically” works afterward.

Do the following fixes (they are safe and align with ABP Angular deployment expectations):

1. Ensure your Angular site serves index.html for deep links (SPA rewrite)

   • In Azure Web App (IIS), add/verify a web.config in your Angular build output (same folder as index.html) that rewrites all non-file, non-folder routes to /index.html.
   • Without SPA rewrite, the first navigation can hit a 404/redirect chain and the config call can fail; after you click around (client-side routing), it works.

2. Ensure the Angular app’s environment.prod.ts points to the correct backend URL (HTTPS)

   • apis.default.url must be the exact public URL of your Host (normally https://...).
   • A common first-load failure is calling the API over http:// (or wrong host) which gets redirected/blocked, while later calls appear fine due to cached baseUrl/config.

3. If UI and Host are on different origins, fix CORS on the Host

   • On the Host, set App:CorsOrigins to include the Angular Web App origin (e.g., https://your-angular-site.azurewebsites.net) exactly.
   • Also ensure App:RedirectAllowedUrls contains your Angular URL (important for auth redirects).

4. Verify the first failing request in the browser Network tab

   • Reload with “Disable cache” enabled.
   • Find the first request that fails (usually the application configuration call).
   • Once you see its status code and whether it’s a redirect, you can map it directly to (1)-(3) above. This is the key: the popup is just a symptom of that initial failed HTTP call.

Sources (validated)

• https://abp.io/docs/latest/framework/ui/angular/quick-start
• https://abp.io/community/articles/gjcb2f1e
• https://github.com/abpframework/abp/blob/dev/npm/ng-packs/packages/theme-shared/src/lib/handlers/error.handler.ts

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• Close ABP Suite completely.
• Run these commands in a terminal (PowerShell/CMD/Bash):

abp logout
abp login

• Then start ABP Suite again and try to open it.

If it still shows “Please login with your account”, this is typically not a framework/runtime issue but a Suite/CLI authentication session problem. In that case, please open a commercial support ticket so the team can check your ABP account/session on the server side:

• https://abp.io/support/questions/New

Links (docs):

• https://abp.io/docs/latest/abp-suite
• https://abp.io/docs/latest/cli

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