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Entra External ID logout JS exception #35123

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guardrex merged 2 commits into from
Apr 2, 2025
Merged

Entra External ID logout JS exception #35123

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Entra External ID logout JS exception
guardrex Apr 2, 2025
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guardrex Apr 2, 2025
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Binary file added aspnetcore/blazor/security/_static/entra-external-id-logout-exception.png
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10 changes: 10 additions & 0 deletions aspnetcore/blazor/security/includes/troubleshoot-server.md
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Expand Up @@ -6,6 +6,16 @@ To enable debug or trace logging for Blazor WebAssembly authentication, see the

### Common errors

* Debugger breaks on an exception during logout with Microsoft Entra External ID

The following exception stops the Visual Studio debugger during logout with [Microsoft Entra External ID](/entra/external-id/external-identities-overview):

> :::no-loc text="Uncaught TypeError TypeError: Failed to execute 'postMessage' on 'Window': The provided value cannot be converted to a sequence.":::

![Visual Studio Debugger breaking on JavaScript exception during logout](../_static/entra-external-id-logout-exception.png)

The exception is thrown from Entra JavaScript code, so this isn't a problem with ASP.NET Core. The exception doesn't impact app functionality in production, so the exception can be ignored during local development testing.

* Misconfiguration of the app or Identity Provider (IP)

The most common errors are caused by incorrect configuration. The following are a few examples:
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