Fix Nginx Upstream Connection Refused in Proxy Pass
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 notesHow to Turn On Bluetooth in Windows 11: Quick Fixes
You open Quick Settings, click the Bluetooth icon, and nothing happens—or the toggle is grayed ou...
Fix Nginx Configuration Test Failure from Rewrite Rules
You run nginx -t and get an error. The log points to a rewrite rule. This is common ...
Chrome Extensions Not Loading: Fixes for Common Issues
If you open Chrome and notice your extensions are missing, grayed out, or not responding, you'...
Node.js Memory Leak Detection: Tools and Practical Fixes
Node.js applications can develop memory leaks over time—heap usage grows steadily, response times...
Fix Firefox Secure Connection Failed DNS Error
You try to visit a website in Firefox and see 'Secure Connection Failed' with an error li...
Issue queue
SitemapFix npm run build Failure Due to Node Version Mismatch
How to Handle Python Dependency Mismatches
How to Fix Git Detached HEAD State and Undo Changes
Chrome Extensions Won't Load – Troubleshooting Guide
Resolve Node Sass Compilation Failure with Build Tools
Fixing Redirect Loop with Cloudflare Full Strict
How to Reduce Memory Usage When Python Reads Large Files
Chrome ERR_CONNECTION_RESET Mac Troubleshooting Guide
Fix VS Code Breakpoints Not Working in SSH/Container
Fix Windows Defender Real-Time Protection Configuration Error
How to Restart Docker Engine Safely (Keep Containers)
Resolving 'Unable to Create index.lock' in Git
How to Handle Python Dependency Mismatches
How to Fix Git Detached HEAD State and Undo Changes
Chrome Extensions Won't Load – Troubleshooting Guide
Resolve Node Sass Compilation Failure with Build Tools
Fixing Redirect Loop with Cloudflare Full Strict
How to Reduce Memory Usage When Python Reads Large Files
Chrome ERR_CONNECTION_RESET Mac Troubleshooting Guide
Fix VS Code Breakpoints Not Working in SSH/Container
Fix Windows Defender Real-Time Protection Configuration Error
How to Restart Docker Engine Safely (Keep Containers)
Resolving 'Unable to Create index.lock' in Git