cursor-common-errors

# 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. **Fix:** 1. Verify subscription at [cursor.com/settings](https://cursor.com/settings) 2. Confirm the email address matches your Cursor account 3. Sign out (`Cmd+Shift+P` > `Sign Out`) then sign back in 4. If on a team plan, ask admin to verify your seat is assigned ### "Session expired" **Symptoms:** Features stop working mid-session. **Fix:** `Cmd+Shift+P` > `Cursor: Sign Out` > Sign back in. This refreshes the auth token. ## AI Completion Errors ### Tab Suggestions Not Appearing **Symptoms:** No ghost text while typing. **Causes and fixes:** | Cause | Fix | |-------|-----| | Tab completion disabled | `Cursor Settings` > `Tab` > enable | | Conflicting extension (Copilot/TabNine) | Disable other completion extensions | | File type not supported | Check file is a recognized language | | Rate limited (Free plan) | Wait or...