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 Remove an Existing Git Remote Origin
If you've cloned a repository or added a remote origin that you no longer need—or if you need...
Docker Network Not Found After Container Restart: Fixes
You restart a Docker container and get an error like network <name> not found....
Cloudflare 522 Error: Analyzing Server Logs for a Fix
You're seeing a 522 error from Cloudflare. That means Cloudflare connected to your origin ser...
How to Fix Chrome Sync Not Working with Multiple Profiles
If you use multiple Chrome profiles—say, one for work and one for personal—sync can sometimes sto...
Resolving Python Dependency Conflicts in pyproject.toml
You've updated a dependency in pyproject.toml, and now pip install ...
Issue queue
SitemapFix Docker Compose Environment Variable Not Set on Build
Cloudflare Wildcard DNS Record Setup Guide
Solving Node.js FATAL ERROR Allocation Failed on Windows
Fix Missing Environment Variables in Docker Compose
Fixing a Detached HEAD State in Visual Studio Code
Windows 11 Taskbar Icon Reset Guide
Git Merge Conflict Markers Explained
Windows 11 Installation Assistant Stuck at 99%: How to Reset and Finish
Windows Defender Real-Time Protection Registry Fix Tutorial
Cloudflare Wildcard Proxy Error Guide
Resolving Cloudflare 522 Origin Timeout
Resolve Permission Denied in VS Code Terminal on Linux
Cloudflare Wildcard DNS Record Setup Guide
Solving Node.js FATAL ERROR Allocation Failed on Windows
Fix Missing Environment Variables in Docker Compose
Fixing a Detached HEAD State in Visual Studio Code
Windows 11 Taskbar Icon Reset Guide
Git Merge Conflict Markers Explained
Windows 11 Installation Assistant Stuck at 99%: How to Reset and Finish
Windows Defender Real-Time Protection Registry Fix Tutorial
Cloudflare Wildcard Proxy Error Guide
Resolving Cloudflare 522 Origin Timeout
Resolve Permission Denied in VS Code Terminal on Linux