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Fix Nginx Upstream Connection Refused Socket Error - Nginx Redirect Loop Not Working: Causes and Fixes-Avoid sudo pip: Fix Permission Denied in Python

Updated 2026-07-28 15:06:32developer-tools

Fix Nginx Upstream Connection Refused Socket Error - Nginx Redirect Loop Not Working: Causes and Fixes-Avoid sudo pip: Fix Permission Denied in Python

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.