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 notesFix Windows 11 Installation Assistant Stuck at 99%
You're running the Windows 11 Installation Assistant, it reaches 99%, and then nothing happen...
How to Fix Git LFS Push Error 403
You're trying to push a large file with Git LFS and get a 403 error. This usually means the s...
Windows Security App Not Opening? Try These Steps
If the Windows Security app won't open, shows a blank screen, or crashes immediately, you'...
Cloudflare SSL Full Strict Not Working? Try These Fixes
You've set Cloudflare SSL/TLS encryption mode to Full (Strict), but your site shows a secure ...
How to Fix Chrome Extensions Not Loading
You open Chrome, click the puzzle icon, and your extensions are grayed out or missing. This is co...
Issue queue
SitemapFix Windows Update Service Stopped Error
Fix ERR_CONNECTION_RESET by Clearing Browser Cache
Fix VSCode Terminal 'Permission Denied' on Windows
Python Version Mismatch Troubleshooting
How to Fix Windows Update Service Not Running
Resolve Python Memory Errors on Windows for Big Files
NGINX 502 Bad Gateway in Docker: Troubleshooting Guide
Docker Compose Port Mapping Not Working: Fixes
How to Fix Bluetooth Not Working in Windows 11
How to Fix Taskbar Icons Not Loading on Startup
How to Solve Git Remote Origin Already Exists
pnpm Install Hangs at Resolving Dependencies Fix
Fix ERR_CONNECTION_RESET by Clearing Browser Cache
Fix VSCode Terminal 'Permission Denied' on Windows
Python Version Mismatch Troubleshooting
How to Fix Windows Update Service Not Running
Resolve Python Memory Errors on Windows for Big Files
NGINX 502 Bad Gateway in Docker: Troubleshooting Guide
Docker Compose Port Mapping Not Working: Fixes
How to Fix Bluetooth Not Working in Windows 11
How to Fix Taskbar Icons Not Loading on Startup
How to Solve Git Remote Origin Already Exists
pnpm Install Hangs at Resolving Dependencies Fix