Thanks for posting your question in the Microsoft Q&A forum.
To resolve this issue, try the following steps:
- Sign out of the Azure portal completely and then sign back in. This will force a new authentication token to be generated.
- Clear your browser cache and cookies, then try accessing the VM again.
- If you're using multiple Microsoft accounts, ensure you're logged in with the correct account that has access to this subscription and VM.
- Try accessing the VM using a different browser or the Azure CLI to rule out any browser-specific issues.
- Check your Azure Active Directory settings to ensure your account is still properly associated with the correct tenant.
Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful