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 notesChrome Profile Sync Not Working After Update: Fixes
After a Chrome update, you might see sync paused or error messages. Your bookmarks, passwords, or...
Enable Edge Sync with Work or School Account
If you're trying to sync your Microsoft Edge settings, passwords, and favorites with a work o...
Docker Build Context Canceled: Checklist and Fixes
You run docker build and see context canceled before the build finishes...
Fix Cloudflare Origin Certificate Error After SSL Change
You changed your SSL/TLS setting in Cloudflare (for example, from Flexible to Full or Full Strict...
Windows 11 Taskbar Icons Missing? Fixes That Actually Work
You boot up Windows 11 and notice the taskbar icons are gone—no Start button, no search, no syste...
Issue queue
SitemapWindows 10 Explorer.exe Keeps Crashing? Fix It Now
How to Fix Windows Update Service Not Running
Windows Update Service Not Running Fix
Restart Docker Engine After Sleep Mode
Fix Missing Taskbar Icons After Uninstalling a Program
Resolve Nginx Redirect Loop Behind Cloudflare
Resolve Chrome Black Screen During Video Playback
How to Fix Cloudflare 521 Error (Port 443 Blocked)
Fixing pip Externally-Managed Environment Errors
Fix VSCode Git Authentication Failed SSH Key Error
Docker Storage Full: Troubleshooting Steps
How to Resolve Git SSL Certificate 'Unable to Get Local Issuer'
How to Fix Windows Update Service Not Running
Windows Update Service Not Running Fix
Restart Docker Engine After Sleep Mode
Fix Missing Taskbar Icons After Uninstalling a Program
Resolve Nginx Redirect Loop Behind Cloudflare
Resolve Chrome Black Screen During Video Playback
How to Fix Cloudflare 521 Error (Port 443 Blocked)
Fixing pip Externally-Managed Environment Errors
Fix VSCode Git Authentication Failed SSH Key Error
Docker Storage Full: Troubleshooting Steps
How to Resolve Git SSL Certificate 'Unable to Get Local Issuer'