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 notesCloudflare 521 Error: How to Check Server Logs
If you're seeing a Cloudflare 521 error, it means Cloudflare tried to connect to your origin ...
Fix Chrome Crashing on Startup in Windows 10
If Chrome crashes immediately or shortly after launching on Windows 10, the cause is often a corr...
Prevent Git Index Lock File Creation: Practical Fixes
If you see fatal: Unable to create 'path/to/.git/index.lock': File exists., ...
Chrome Certificate Error: Not Secure Site Workaround
You're trying to reach a site and Chrome shows a full-page warning: “Your connection is not p...
How to Fix an Nginx Redirect Loop: Step-by-Step
You load a site and the browser keeps spinning—eventually showing 'redirect loop' or '...
Issue queue
SitemapFix Docker No Space Left on Device on Ubuntu
How to Force Cloudflare DNS to Update
pnpm Workspace Setup Error Fixes
Verify Cloudflare DNS Changes with This Checklist
Chrome Memory Saver and Tab Limits
How to Resolve 'Git Remote Origin Already Exists' in VS Code
Fix Chrome Certificate Error: Invalid Authority Registry on Windows
Chrome SSL Certificate Reinstall: Invalid Authority Fix
How to Fix Update Error 0x80070002 from Network Problems
Fix Windows Search Indexing Stuck: Practical Steps
Recover from Git Detached HEAD State
Resolve pip Externally Managed Environment Error
How to Force Cloudflare DNS to Update
pnpm Workspace Setup Error Fixes
Verify Cloudflare DNS Changes with This Checklist
Chrome Memory Saver and Tab Limits
How to Resolve 'Git Remote Origin Already Exists' in VS Code
Fix Chrome Certificate Error: Invalid Authority Registry on Windows
Chrome SSL Certificate Reinstall: Invalid Authority Fix
How to Fix Update Error 0x80070002 from Network Problems
Fix Windows Search Indexing Stuck: Practical Steps
Recover from Git Detached HEAD State
Resolve pip Externally Managed Environment Error