How to fix this error

Question

Error

Something went wrong. [4vt9f]

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Troubleshooting details

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Correlation Id: [Moderator note: personal info removed]

Timestamp: 2026-01-16T00:09:19.000Z

DPTI: [Moderator note: personal info removed]

Message: The credential is invalid.

Tag: 4vt9f

Code: 0

Answer 1

Hello,

If you are experiencing issues with your Office applications, please try repairing or reinstalling Office.

"Something went wrong" error when you try to start a Microsoft 365 app

Answer 2

The error message you are encountering, "The credential is invalid," typically indicates an issue with the sign-in credentials being used. Here are some steps you can take to troubleshoot this issue:

1. Verify Credentials: Ensure that the username and password you are entering are correct. Double-check for any typos or case sensitivity.
2. Check Account Status: Confirm that your account is active and not locked or disabled. You may need to contact your administrator for assistance with this.
3. Clear Cache and Cookies: Sometimes, clearing your browser's cache and cookies can resolve login issues. Try this and then attempt to sign in again.
4. Use a Different Browser or Incognito Mode: If the issue persists, try using a different web browser or open an incognito/private browsing window to rule out browser-specific issues.
5. Contact Administrator: If none of the above steps work, you should contact your system administrator and provide them with the correlation ID and timestamp from the error message. This information can help them diagnose the issue more effectively.

If the problem continues after trying these steps, further investigation may be necessary to identify any underlying issues with the authentication process.

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References:

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