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 Docker Compose Environment Variable Not Set on Build
You've defined environment variables in your docker-compose.yml under envi...
Fix Error 0x80070002 in Windows Update Registry
Error 0x80070002 during Windows Update typically means the system cannot find a required file. Th...
Git Merge Conflict Auto Resolve Not Working: Common Fixes
You run git merge expecting conflicts to be resolved automatically, but instead you ...
Python Requests: Setting Timeout for POST Requests
When your Python script makes a POST request to an external API or web service, a slow or unrespo...
How to Fix Cloudflare 522 Error: Origin Server Timeout
If you see a Cloudflare 522 error, it means your origin server didn't respond in time. This u...
Issue queue
SitemapFix npm run build Failure from Missing Env Variables
Fix Git Index Lock File Exists Error
Windows 11 Assistant Stuck at 99 SFC Scan Fix
How to Resolve Python pip Dependency Conflicts
Python Requests Timeout: Example Code and Fixes
Windows Taskbar Icons Missing from System Tray
Volume Mount Causing Docker Container to Exit – Solutions
Avoid Memory Errors Reading Large Files in Python
Resolving Conflicts When Merging Git Branches
Docker Container Killed by OOM: Diagnosis
How to Recover Stashed Changes in Git Detached HEAD
Fix Docker Network Not Found Error
Fix Git Index Lock File Exists Error
Windows 11 Assistant Stuck at 99 SFC Scan Fix
How to Resolve Python pip Dependency Conflicts
Python Requests Timeout: Example Code and Fixes
Windows Taskbar Icons Missing from System Tray
Volume Mount Causing Docker Container to Exit – Solutions
Avoid Memory Errors Reading Large Files in Python
Resolving Conflicts When Merging Git Branches
Docker Container Killed by OOM: Diagnosis
How to Recover Stashed Changes in Git Detached HEAD
Fix Docker Network Not Found Error