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 Push a Git Detached HEAD to Remote
You're working on a Git repository and realize you're in a 'detached HEAD' state....
Fixing Cloudflare SSL Full Strict Sync Issues
When you enable Cloudflare's SSL/TLS encryption mode to Full (Strict), your site may stop syn...
How to Fix Cloudflare 521 Error During Setup
If you see a 521 error after setting up Cloudflare, it means your origin server refused the conne...
Fix Git SSL Certificate Problem Unable to Get Local Issuer on Ubuntu
When you see git SSL certificate problem: unable to get local issuer certificate on ...
Fix Git 'fatal: refusing to merge unrelated histories' on GitHub
You try to merge two branches in Git, and get fatal: refusing to merge unrelated histories<...
Issue queue
SitemapNode Sass Build Failure: Node Version Mismatch Fix
Resolve npm Install Node Version Mismatch
Nginx Permission Denied on Config File Fix
How to Fix Black Screen After Enabling Hardware Acceleration in Chrome
Nginx Cloudflare 521 Troubleshooting Guide
Chrome Using Too Much Memory? Here's How to Fix It
Fix Docker No Space Left on Device Error
Fix Docker Nginx 502 Bad Gateway After Restart
Troubleshooting Cloudflare 522: Connection Timeout
Debugging C++ in VS Code: Breakpoints Not Hit
How to Fix Python UnicodeDecodeError: 'utf-8' Codec Can't Decode Byte
SourceTree Detached HEAD: How to Fix It
Resolve npm Install Node Version Mismatch
Nginx Permission Denied on Config File Fix
How to Fix Black Screen After Enabling Hardware Acceleration in Chrome
Nginx Cloudflare 521 Troubleshooting Guide
Chrome Using Too Much Memory? Here's How to Fix It
Fix Docker No Space Left on Device Error
Fix Docker Nginx 502 Bad Gateway After Restart
Troubleshooting Cloudflare 522: Connection Timeout
Debugging C++ in VS Code: Breakpoints Not Hit
How to Fix Python UnicodeDecodeError: 'utf-8' Codec Can't Decode Byte
SourceTree Detached HEAD: How to Fix It