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 notesFix Windows Defender Real-Time Protection Configuration Error
You open Windows Security and see a message that real-time protection is turned off or has a conf...
How to Fix Windows Update Error 0x80070002
Windows Update error 0x80070002 usually appears when the system cannot find a required file durin...
Fix 'Permission Denied' Error When Saving VS Code settings.json
You open VS Code's settings.json (either user or workspace), make a change, and try to save. ...
Fix Chrome Certificate Error: Invalid Authority & Date/Time Issue
You're browsing in Chrome and see a full-page warning: Your connection is not private...
Fix WiFi No Internet After Windows 11 Update
After a Windows 11 update, you might see your WiFi connected but with no internet access. This is...
Issue queue
SitemapResolve pip Externally Managed on Debian Bookworm
VS Code terminal blank or not starting Windows 10
Git Merge Conflict Abort Error Solutions
Express Breakpoints Not Working in VS Code
How to Fix Cloudflare SSL Full Strict Self-Signed Certificate Error
Fix Docker Compose Port Allocation Errors
How to Fix 'npm package json not found' with npx
Windows Search Index Rebuild Guide
How to Fix Access Denied When Mapping Network Drive in Windows 10
Fix Docker Nginx 502 Bad Gateway with MySQL
Resolve Chrome Status Access Violation Error Guide
Troubleshooting Cloudflare 522: Connection Timeout
VS Code terminal blank or not starting Windows 10
Git Merge Conflict Abort Error Solutions
Express Breakpoints Not Working in VS Code
How to Fix Cloudflare SSL Full Strict Self-Signed Certificate Error
Fix Docker Compose Port Allocation Errors
How to Fix 'npm package json not found' with npx
Windows Search Index Rebuild Guide
How to Fix Access Denied When Mapping Network Drive in Windows 10
Fix Docker Nginx 502 Bad Gateway with MySQL
Resolve Chrome Status Access Violation Error Guide
Troubleshooting Cloudflare 522: Connection Timeout