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How to Fix Git Push Rejected Non-Fast-Forward Error - Fix Nginx 502 Bad Gateway: Upstream Connection Refused-Nginx -t Error Troubleshooting on Ubuntu

Updated 2026-07-28 12:27:28windows-fixes
How to Fix Git Push Rejected Non-Fast-Forward Error - Fix Nginx 502 Bad Gateway: Upstream Connection Refused-Nginx -t Error Troubleshooting on Ubuntu
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.