Fix Nginx Upstream Connection Refused in Proxy Pass
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 notesVSCode Python Debugger Breakpoint Not Stopping: Fixes
You set a breakpoint in VSCode, start debugging, and execution passes right through it. The debug...
Fix Windows 11 Blue Screen After Update with Bootable USB
After a Windows 11 update, some systems boot into a blue screen (BSOD) or crash loop. This usuall...
Fix npm Run Build Out of Memory Errors
If your npm run build fails with an out-of-memory error, you're not alone. This ...
Windows Update Service Not Running in Windows 11: Fix It
If Windows Update won't start and you see an error like "Windows Update service is not ru...
Fix Cloudflare Origin Certificate Mismatch Errors
If you see 'Origin Certificate Mismatch' in Cloudflare or browser warnings, it usually me...
Issue queue
SitemapFix 'docker compose port already bound to host' Error
Git Detached HEAD Commit Recovery Guide
Nginx Upstream Connection Refused Error Fix
Docker Network Not Found on Mac: How to Fix
Troubleshooting Cloudflare SSL Full Strict Errors
Windows Update Error 0x800f081f: Troubleshooting Steps
Fix npm install ENOENT Error: No Such File or Directory
Windows 11 Safe Mode Update Stuck: Solutions
Fix Git Push Rejected Non-Fast-Forward After Pull
How to Fix Git Authentication Failure in VS Code
How to Fix TypeScript Breakpoints in VSCode
How to Fix Windows Update Error 0x80070005 by Taking Ownership
Git Detached HEAD Commit Recovery Guide
Nginx Upstream Connection Refused Error Fix
Docker Network Not Found on Mac: How to Fix
Troubleshooting Cloudflare SSL Full Strict Errors
Windows Update Error 0x800f081f: Troubleshooting Steps
Fix npm install ENOENT Error: No Such File or Directory
Windows 11 Safe Mode Update Stuck: Solutions
Fix Git Push Rejected Non-Fast-Forward After Pull
How to Fix Git Authentication Failure in VS Code
How to Fix TypeScript Breakpoints in VSCode
How to Fix Windows Update Error 0x80070005 by Taking Ownership