Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesWindows Search Index Not Finding Files: How to Fix
Windows Search stops finding files for a variety of reasons. The index might be corrupted, settin...
Fix Docker 'network not found' Error for Custom Networks
You create a custom Docker network, then try to run a container attached to it, but get an error ...
Docker Container Exits Immediately: No Error, Common Fixes
You run docker run and the container starts, then exits within a second. No error me...
Fixing Cloudflare 521 Error: Origin Unreachable
When you see Cloudflare error 521, it means your origin server is refusing the connection from Cl...
Chrome Certificate Error Invalid Authority: Diagnosis Checklist
When Chrome shows NET::ERR_CERT_AUTHORITY_INVALID and refuses to load a site, it...
Issue queue
SitemapFix ERR_NAME_NOT_RESOLVED in Chrome Safe Mode
Fix Node.js Out of Memory Errors in npm Scripts
Docker Desktop Firewall Block: Engine Stopped Troubleshooting
Cloudflare 521 Troubleshooting Guide
Fix Python Virtual Environment Not Working Windows 10
Docker Compose Env Variable Not Passed to Container
Resolve Git Authentication Failed in VS Code macOS
npm install Permission Denied Troubleshooting Guide
Docker Build Canceled on WSL2: How to Fix
Windows Explorer Keeps Restarting in Windows 11: Fixes
Resolve Docker Pull Access Denied Despite Successful Login
How to Stop Chrome Memory Spikes During Video Playback
Fix Node.js Out of Memory Errors in npm Scripts
Docker Desktop Firewall Block: Engine Stopped Troubleshooting
Cloudflare 521 Troubleshooting Guide
Fix Python Virtual Environment Not Working Windows 10
Docker Compose Env Variable Not Passed to Container
Resolve Git Authentication Failed in VS Code macOS
npm install Permission Denied Troubleshooting Guide
Docker Build Canceled on WSL2: How to Fix
Windows Explorer Keeps Restarting in Windows 11: Fixes
Resolve Docker Pull Access Denied Despite Successful Login
How to Stop Chrome Memory Spikes During Video Playback