How to Fix Git Detached HEAD in IntelliJ IDEA - Fix Nginx Upstream Connection Refused & Upstream Not Found-Node.js Memory Errors: Heap vs Stack

Updated 2026-07-28 16:42:50security-tools
How to Fix Git Detached HEAD in IntelliJ IDEA - Fix Nginx Upstream Connection Refused & Upstream Not Found-Node.js Memory Errors: Heap vs Stack
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.