Fix Nginx Upstream Connection Refused Socket Error
When Nginx returns a 502 Bad Gateway or logs upstream connection refused
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Fix Git Authentication Failed in VS Code
You're in VS Code, push or pull fails with "Authentication failed"—this is common and...
Fix npm install Permission Denied When Using nvm
If you see 'EACCES: permission denied' when running npm install while using ...
Fix npm Global Install Permission Denied Without Sudo
When you run npm install -g and see "EACCES: permission denied", it's be...
Checklist for Fixing Shared Folder Access in Windows
When you can't access a shared folder on Windows, the problem usually comes down to permissio...
How to Fix Git Merge Conflict Permission Denied Errors
You're in the middle of a git merge, and instead of the usual conflict markers, you see
Issue queue
SitemapResolve Git SSL Certificate Error: Unable to Get Local Issuer
How to Resolve Chrome Invalid Authority Registry Error on Windows
How to Fix Venv Activation Problems
npm install Permission Denied Troubleshooting Guide
Docker Default Network Not Found Fix
How to Fix Docker Access Denied on Image Pull
Chrome Freezes at Launch on Mac – Troubleshooting Guide
VSCode Breakpoint Not Hit Due to Source Maps: Fix
Resolve Nginx Access Denied Errors
How to Fix Bluetooth Driver Issues in Windows 11
Chrome Update Broke DNS? Try These Fixes
How to Resolve Chrome Safe Mode Access Violation
How to Resolve Chrome Invalid Authority Registry Error on Windows
How to Fix Venv Activation Problems
npm install Permission Denied Troubleshooting Guide
Docker Default Network Not Found Fix
How to Fix Docker Access Denied on Image Pull
Chrome Freezes at Launch on Mac – Troubleshooting Guide
VSCode Breakpoint Not Hit Due to Source Maps: Fix
Resolve Nginx Access Denied Errors
How to Fix Bluetooth Driver Issues in Windows 11
Chrome Update Broke DNS? Try These Fixes
How to Resolve Chrome Safe Mode Access Violation