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 notesFix Git SSL Certificate Problem: Unable to Get Local Issuer
If you see fatal: unable to access 'https://...': SSL certificate problem: unable t...
Fix Nginx 502 Bad Gateway with Docker Multiple Containers
If you run Nginx as a reverse proxy in front of multiple Docker containers, a 502 Bad Gateway err...
Fixing Python UnicodeDecodeError with latin-1 Codec
You're reading a file in Python and hit UnicodeDecodeError: 'charmap' codec can...
Fix 'Permission Denied' Error When Using pip Install on Linux
When you run pip install somepackage on Linux and see Permission denied...
Docker Container Exits Immediately on Linux: Fixes
You start a Docker container, but it exits immediately. This is a common issue on Linux. The cont...
Issue queue
SitemapHow to Fix NET::ERR_CERT_AUTHORITY_INVALID from Chrome Policy
Resolve 'python' Not Found Error When Running Scripts
Fix Windows 11 Bluetooth Driver Not Working
Fix Docker Permission Denied Container Exit
Fix Error 525 SSL Handshake Failed Cloudflare
Ubuntu Python venv Not Activating: Troubleshooting Guide
Port Already Allocated in Docker Compose
How to Use Git LFS Migrate and Push Correctly
Resolve Docker 'network not found' Error in Linux
How to Fix Windows Cannot Access Shared Folder in Windows 10
How to Unstick Windows 11 Install at 99% in Safe Mode
How to Fix Permission Denied Error in Windows 11 Update
Resolve 'python' Not Found Error When Running Scripts
Fix Windows 11 Bluetooth Driver Not Working
Fix Docker Permission Denied Container Exit
Fix Error 525 SSL Handshake Failed Cloudflare
Ubuntu Python venv Not Activating: Troubleshooting Guide
Port Already Allocated in Docker Compose
How to Use Git LFS Migrate and Push Correctly
Resolve Docker 'network not found' Error in Linux
How to Fix Windows Cannot Access Shared Folder in Windows 10
How to Unstick Windows 11 Install at 99% in Safe Mode
How to Fix Permission Denied Error in Windows 11 Update