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 notesHow to Fix Docker Desktop Engine Stopped Error Code 0
If Docker Desktop shows "Engine Stopped" with error code 0, the application thinks the Do...
Git Detached HEAD vs Attached HEAD: What It Means and How to Fix
If you've seen the message "You are in 'detached HEAD' state" while using Git...
Fix Nginx 502 Bad Gateway with Docker and PHP-FPM
You have a Docker setup with Nginx proxying to a PHP-FPM container, and you're getting a 502 ...
Fix Windows Explorer Restarting: Performance Troubleshooting Guide
Windows Explorer repeatedly restarting can make your PC nearly unusable. The taskbar flickers, fi...
Fix 'Windows Cannot Access Shared Folder' Credential Errors
When you try to open a shared folder from another computer and see 'Windows cannot access'...
Issue queue
SitemapMac Chrome Sync Failure: Troubleshooting Guide
Windows 11 Installation Assistant Not Completing Setup: Fixes
Troubleshooting Windows Workgroup Sharing Errors
Troubleshooting 502 Errors with Nginx and Docker Compose
VS Code pip Install Permission Error Fix
How to Enable Greyed Out Defender Real-Time Protection
Windows 11 Python Command Not Found Guide
How to Fix Git index.lock File Exists Error on Mac
How to Fix Docker Nginx 502 with Multiple Containers
Chrome Extensions Permission Denied: How to Fix
Antivirus Causing Chrome Access Violation: Solutions
Cloudflare Origin Certificate Setup Checklist
Windows 11 Installation Assistant Not Completing Setup: Fixes
Troubleshooting Windows Workgroup Sharing Errors
Troubleshooting 502 Errors with Nginx and Docker Compose
VS Code pip Install Permission Error Fix
How to Enable Greyed Out Defender Real-Time Protection
Windows 11 Python Command Not Found Guide
How to Fix Git index.lock File Exists Error on Mac
How to Fix Docker Nginx 502 with Multiple Containers
Chrome Extensions Permission Denied: How to Fix
Antivirus Causing Chrome Access Violation: Solutions
Cloudflare Origin Certificate Setup Checklist