Fix Nginx Upstream Connection Refused Socket Error - Docker Build Fails with Context Canceled Permission Denied-Git SSL Certificate Update Guide for 'local issuer'

Updated 2026-07-28 15:05:13macos-help

Fix Nginx Upstream Connection Refused Socket Error - Docker Build Fails with Context Canceled Permission Denied-Git SSL Certificate Update Guide for 'local issuer'

Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

Restart the affected app after changing permissions or configuration files.
Test the same workflow in a clean browser profile or a temporary user account.
Compare the result on another network if the error may be connection related.