Cursor Common Errors

Diagnostic and resolution guide for the most frequent Cursor IDE issues. Organized by error category with specific symptoms, causes, and fixes.

Authentication Errors

"Sign-in failed" / OAuth Loop

Symptoms: Browser opens for auth, redirects back, Cursor still shows "Sign In".

Fix:

1. Clear browser cookies for cursor.com and auth.cursor.com
2. Try incognito/private window for the OAuth flow
3. Check if browser is blocking popups from cursor.com
4. Try a different auth method (GitHub vs Google vs email)

"License not found" / "No active subscription"

Symptoms: Signed in but AI features are disabled.