How to Fix Git index.lock File Exists Error on Mac - Resolve ERR_CONNECTION_RESET in Chrome Following Router Restart-Checklist for Nginx Configuration Test Failure

Updated 2026-07-28 14:29:53security-tools
How to Fix Git index.lock File Exists Error on Mac - Resolve ERR_CONNECTION_RESET in Chrome Following Router Restart-Checklist for Nginx Configuration Test Failure
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.