Home / database-tools / Fix Nginx 'upstream connection refused' When Talking to PHP-FPM - Resolve net::ERR_CERT_AUTHORITY_INVALID in Chrome for Android-How to Fix Nginx Location Directive Syntax Errors

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM - Resolve net::ERR_CERT_AUTHORITY_INVALID in Chrome for Android-How to Fix Nginx Location Directive Syntax Errors

Updated 2026-07-28 05:54:59database-tools

Fix Nginx 'upstream connection refused' When Talking to PHP-FPM - Resolve net::ERR_CERT_AUTHORITY_INVALID in Chrome for Android-How to Fix Nginx Location Directive Syntax Errors

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.