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 notesFixing Edge Sync Error 0x80072efd on Windows
If you see error code 0x80072efd when trying to sync your Microsoft Edge browser data, the sync p...
Windows Explorer Restarting Checklist for Advanced Users
If Windows Explorer (explorer.exe) keeps restarting—freezing, flashing, or crashing repeatedly—it...
Fix Nginx 'Permission Denied' Upstream Errors
When Nginx logs permission denied while connecting to an upstream (e.g., a Unix sock...
Checklist to Fix npm Permission Denied Errors
If you see "EACCES: permission denied" or "Error: EACCES, mkdir" when running npm...
How to Create a Docker Network If Not Found
When you run a Docker container and get an error like network not found, it means th...
Issue queue
SitemapStop Git Clone Timeouts with These Config Tweaks
Port Already Allocated in Docker Compose
How to Fix Bluetooth Not Working in Windows 11
npm install EACCES Permission Denied Fix
Adding a Wildcard Subdomain in Cloudflare DNS
Fix Windows 11 Blue Screen After Memory Diagnostic
Troubleshoot Cloudflare 521 SSL Errors
Fix npm install Permission Denied in VS Code Terminal
npm EACCES Error: How to Avoid sudo
Resolve Node Version Mismatch in npm install
Pre-Merge Checklist to Avoid Git Conflicts
Fix VS Code Git Authentication Failed Error
Port Already Allocated in Docker Compose
How to Fix Bluetooth Not Working in Windows 11
npm install EACCES Permission Denied Fix
Adding a Wildcard Subdomain in Cloudflare DNS
Fix Windows 11 Blue Screen After Memory Diagnostic
Troubleshoot Cloudflare 521 SSL Errors
Fix npm install Permission Denied in VS Code Terminal
npm EACCES Error: How to Avoid sudo
Resolve Node Version Mismatch in npm install
Pre-Merge Checklist to Avoid Git Conflicts
Fix VS Code Git Authentication Failed Error