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Fix Git 'index.lock file exists' Error - How to Resolve Nginx Upstream Connection Refused Error 502-Docker Compose Environment Variable Override Not Working: Fixes & Checks

Updated 2026-07-28 21:52:39browser-issues

Fix Git 'index.lock file exists' Error - How to Resolve Nginx Upstream Connection Refused Error 502-Docker Compose Environment Variable Override Not Working: Fixes & Checks

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.