Fix Grok Bot Authentication Error login loop

After a browser sign-in succeeds, Grok Bot can still show Authentication Error / try logging in again on Mac, Windows, and phone. The UI may look signed in while chat fails. Cluster threads: 170963, 171115, 171164.

Try client steps first

1. Fully quit Grok Bot (Mac: Quit from the menu bar, not only close the window).
2. Update to the latest desktop build, then relaunch.
3. Open Settings → Updates → Update Grok Bot’s Computer when that control is available (forum report on 0.47.0: 171164 — rodschulz recovered after Update Computer).
4. Sign out, sign in again with the same Cursor account, then quit and reopen once more.
5. If Legacy Privacy Mode or Active Sessions revoke is in play, follow those dedicated how-tos first — different failure modes.

When it stays broken

Staff on 171115 (kevinn): some accounts need a backend machine reset. Reinstall and cache clear do not always clear the loop. Contact hi@cursor.com with:

• Cursor / Grok Bot account email
• OS and Grok Bot version
• Screenshot of the Authentication Error after a successful browser login
• Link to the forum thread you match

Ask for a backend machine reset when client Update Computer and quit/relaunch already failed.

Pitfalls

• Reset / Recover of the Agent Computer for a pure auth-token loop — staff treated several cases as backend session repair, not a user rebuild.
• Mixing this with Fix Grok Bot sign-in and Legacy Privacy Mode or Fix Grok Bot after Active Sessions revoke without checking those symptoms first.
• Expecting phone-only login to heal a desktop session that still shows Authentication Error after browser auth.