External user experiencing the Owl error while attempting to access the guest tenant

Hi Bhaskar_D ,

Thank you for confirming the steps you've taken so far. This issue might be related to recent updates in tenant policies, authentication settings, or user permissions. Please follow these additional troubleshooting steps.

1. Guest user tokens can sometimes expire or become invalid. Try removing the user from Azure AD and then re-inviting them to reset any stale authentication tokens.
2. In Azure AD, navigate to External Identities  Cross-tenant access settings and ensure that B2B collaboration is properly configured, and the guest tenant is allowed.
3. Check if any Conditional Access Policies have been updated recently that might be blocking external users. If so, try temporarily disabling them for testing purposes.

If none of these steps resolve the issue, please consider raising a support ticket for further assistance.

To raise a support ticket for Fabric and Power BI, kindly follow the steps outlined in the following guide: How to create a Fabric and Power BI Support ticket - Power BI | Microsoft Learn 

Regards,

Yugandhar.