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How to Fix Nginx 'Upstream Connection Refused' Error - How to Fix VS Code Permission Denied Error When Saving-Docker Compose Environment Variables: .env, Shell, and More

Updated 2026-07-28 15:54:08browser-issues
How to Fix Nginx 'Upstream Connection Refused' Error - How to Fix VS Code Permission Denied Error When Saving-Docker Compose Environment Variables: .env, Shell, and More
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.