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 Fix Windows 11 Installation Assistant Stuck at 99%
You're running the Windows 11 Installation Assistant, it reaches 99%, and then... nothing. Th...
Fix Windows Security App Permission Issues
You open Windows Security and see a message like "This app has been blocked for your protecti...
Windows 11 Update Stuck at 0% Due to Corrupt Files: Fixes
You start a Windows 11 update, and it hangs at 0% for minutes or hours. Corrupt system files are ...
Fixing Python Requests Timeout Errors: Codes & Solutions
When using the Python Requests library, a timeout error can stop your script mid-flight. You migh...
Fix Docker Pull Access Denied: Authentication Required
When you run docker pull and get an error like access denied: authentication r...
Issue queue
SitemapDocker Compose Environment File Override Troubleshooting
Mac Git Troubleshooting: index.lock File Exists
How to Restore PowerShell IntelliSense in VS Code
Chrome PDF Access Violation Error Fix
Fix Wi-Fi Adapter Not Working in Windows 11: No Internet
Fix Windows Security App Crashing on Windows 10/11
How to Fix Chrome DNS Error via Router
How to Fix npm run build After npm install
Cloudflare 521 Error: Origin Server Unreachable Fix
Docker Compose Ports Not Working? Here's How to Fix
How to Fix Pipenv Dependency Version Clashes
Troubleshoot Windows Defender Real-Time Protection Stuck Off
Mac Git Troubleshooting: index.lock File Exists
How to Restore PowerShell IntelliSense in VS Code
Chrome PDF Access Violation Error Fix
Fix Wi-Fi Adapter Not Working in Windows 11: No Internet
Fix Windows Security App Crashing on Windows 10/11
How to Fix Chrome DNS Error via Router
How to Fix npm run build After npm install
Cloudflare 521 Error: Origin Server Unreachable Fix
Docker Compose Ports Not Working? Here's How to Fix
How to Fix Pipenv Dependency Version Clashes
Troubleshoot Windows Defender Real-Time Protection Stuck Off