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How to Fix Nginx 'Upstream Connection Refused' Error - Resolve Error 526 with Cloudflare Origin Certificates-Git Merge --allow-unrelated-histories: When and How to Use It

2026-07-28 10:48:45
How to Fix Nginx 'Upstream Connection Refused' Error - Resolve Error 526 with Cloudflare Origin Certificates-Git Merge --allow-unrelated-histories: When and How to Use It

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.

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