Fixing Nginx Upstream Connection Refused on Port 443
You see "upstream connection refused" in your Nginx error log when proxying requests to p...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesHow to Recover Stashed Changes in Git Detached HEAD
If you've stashed changes while in a detached HEAD state in Git, you might worry they're ...
Fix Windows Update Service Not Running for System Restore
You might see “System Restore did not complete successfully” or “Windows Update service is not ru...
Fix Node Version Incompatible with npm Package Error
When you run npm install and see an error like Unsupported engine or
Fix Chrome Black Screen Flickering from Hardware Acceleration
If Chrome shows a black screen or flickers when watching videos, scrolling, or opening menus, har...
Cloudflare Origin Certificate Setup Checklist
You've set up Cloudflare but your origin server still shows SSL errors or mixed content warni...
Issue queue
SitemapResolve Python pip Permission Denied on Linux/macOS/Windows
Debugging Nginx Redirect Loop in Server Block
Resolve 0xc0000005 Explorer Crash – Step by Step
Git index.lock File Exists: Causes and Solutions
How to Restore Missing Taskbar Icons Windows 10
pnpm ERR! Cannot Find Module – Troubleshooting Guide
Chrome Crashing on Startup in Windows 11? Try These Fixes
Windows Explorer Restart Loop Safe Mode Fix
How to Rebuild Windows Search Index Safely
Fix Taskbar Icons in Windows 10 by Rebuilding Cache
Chrome Sync Broken by Proxy? Here's the Fix
What Git Merge Conflict Markers Mean and How to Fix Them
Debugging Nginx Redirect Loop in Server Block
Resolve 0xc0000005 Explorer Crash – Step by Step
Git index.lock File Exists: Causes and Solutions
How to Restore Missing Taskbar Icons Windows 10
pnpm ERR! Cannot Find Module – Troubleshooting Guide
Chrome Crashing on Startup in Windows 11? Try These Fixes
Windows Explorer Restart Loop Safe Mode Fix
How to Rebuild Windows Search Index Safely
Fix Taskbar Icons in Windows 10 by Rebuilding Cache
Chrome Sync Broken by Proxy? Here's the Fix
What Git Merge Conflict Markers Mean and How to Fix Them