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 notesWindows Defender Real-Time Protection Keeps Turning Off: Fixes
You notice the Windows Security icon in the system tray shows a yellow warning. Opening it reveal...
How to Use Chrome's Built-in Memory Cleanup Tool
If Chrome is eating up your system memory and slowing everything down, you don't need third-p...
Fix Chrome Crash on Startup Due to Corrupt User Profile
If Chrome crashes immediately when you open it, or shows a warning that your profile may be corru...
Docker Pull Access Denied on Mac M1: Step-by-Step Fix
If you're running Docker on an Apple M1 Mac and see 'access denied' when pulling an i...
How to Fix Cloudflare 521 Error with Firewall Settings
If you see a 521 Web Server Is Down error when visiting your site through Cloudf...
Issue queue
SitemapFix VS Code Source Control Not Detecting Changes on Mac
How to Merge Two Git Repositories with Unrelated Histories
Chrome Extensions Not Loading: Quick Fixes
Chrome Memory Not Decreasing After Closing Tabs – Fixes
Troubleshoot Chrome Sync Issues Windows 10
VS Code Save Permission Error Fix
How to Handle Huge Files in Python Without Memory Issues
Resolve Cloudflare 521 Error (Port 443 Blocked)
Windows 11 Update Stuck at 0%? Try a Clean Boot
How to Fix Chrome Profile Sync After Update
All Websites Show Secure Connection Failed in Firefox: Solutions
Windows 11 Update Stuck at 0%? Here's How to Fix It
How to Merge Two Git Repositories with Unrelated Histories
Chrome Extensions Not Loading: Quick Fixes
Chrome Memory Not Decreasing After Closing Tabs – Fixes
Troubleshoot Chrome Sync Issues Windows 10
VS Code Save Permission Error Fix
How to Handle Huge Files in Python Without Memory Issues
Resolve Cloudflare 521 Error (Port 443 Blocked)
Windows 11 Update Stuck at 0%? Try a Clean Boot
How to Fix Chrome Profile Sync After Update
All Websites Show Secure Connection Failed in Firefox: Solutions
Windows 11 Update Stuck at 0%? Here's How to Fix It