I understand that you are encountering an issue, It sounds like you're encountering a 401 Unauthorized error with the Immersive Reader in your project. This error typically indicates an issue with authentication or authorization.
Here are some steps:
1.Above Error suggestions either endpoint URL or key is malformed on invalid. Please make sure that your URL and endpoint is not containing any space or not malformed.
2. Please Clear cache from website and make sure your Immersive Reader resource is properly configured to use Microsoft Entra authentication and other authentications methods. Confirm that the TENANT_ID, CLIENT_ID, and CLIENT_SECRET in your environment are correctly set.
If the issue still persists, please support ticket.
kindly refer below documentation: authenticate
Hope this helps. Do let us know if you any further queries.
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