How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Rebuild Taskbar Icon Cache in Windows 10
If your Windows 10 taskbar icons appear blank, wrong, or missing, the icon cache may be corrupted...
Remote Desktop Connection Fails: RDP Port Not Open
You try to connect via Remote Desktop, but the client says it can't connect. One of the most ...
VSCode Breakpoint Not Working? Here's How to Fix It
You set a breakpoint, start debugging, but the code runs past it without stopping. This is a comm...
Fix Nginx Redirect Loop Caused by Rewrite Rules
Redirect loops in Nginx often appear as endless redirects between two URLs or as a browser error ...
Fix Chrome Certificate Error After Update
After a Chrome update, you might see errors like “Your connection is not private” or “NET::ERR_CE...
Issue queue
SitemapResolve Docker Network Not Found Default Bridge
Fix Docker Container Exiting on macOS
Fix VS Code Source Control Not Detecting Changes on Windows 11
Git Clone Connection Timed Out? Firewall Fixes
How to Fix Firefox Secure Connection Failed Error
Prevent Git Index Lock File Creation: Practical Fixes
How to Set Up Windows Search Indexing
Troubleshooting Cloudflare 521 Connection Error
Fix Discord Black Screen from Chrome Hardware Acceleration
Windows 11 Blue Screen After Update: Hardware Issue Fixes
Windows Update Caused Taskbar Icons to Vanish – Solutions
How to Show Git Changes in VS Code Source Control
Fix Docker Container Exiting on macOS
Fix VS Code Source Control Not Detecting Changes on Windows 11
Git Clone Connection Timed Out? Firewall Fixes
How to Fix Firefox Secure Connection Failed Error
Prevent Git Index Lock File Creation: Practical Fixes
How to Set Up Windows Search Indexing
Troubleshooting Cloudflare 521 Connection Error
Fix Discord Black Screen from Chrome Hardware Acceleration
Windows 11 Blue Screen After Update: Hardware Issue Fixes
Windows Update Caused Taskbar Icons to Vanish – Solutions
How to Show Git Changes in VS Code Source Control