Fix VSCode Git Authentication Failed SSH Key Error - npm Run Build Failed: Common Fixes-Fix Nginx Upstream Connection Refused in Docker

Updated 2026-07-28 13:50:03security-tools
Fix VSCode Git Authentication Failed SSH Key Error - npm Run Build Failed: Common Fixes-Fix Nginx Upstream Connection Refused in Docker
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.