Nginx Upstream Connection Refused: Diagnosis and Fixes
When Nginx returns a 502 Bad Gateway or logs "upstream connection refused", it means Ngin...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesWindows 11 Installation Assistant Stuck at 99%: How to Reset and Finish
You're upgrading to Windows 11 using the Installation Assistant, and it gets stuck at 99% for...
Remote Desktop Connection Fails: RDP Port Not Open
You try to connect via Remote Desktop, but the client says it can't connect. One of the most ...
Docker Network Not Found: Troubleshooting Checklist
When Docker complains network not found, containers can't start or connect. This...
How to Fix ERR_CONNECTION_RESET in Chrome
If you see ERR_CONNECTION_RESET in Chrome, the browser can't establish a con...
Fix git index.lock File Exists Error on Windows
If you see fatal: Unable to create 'index.lock': File exists. when running G...
Issue queue
SitemapcPanel Cloudflare Origin Certificate Installation Guide
PowerShell Venv Activation Not Working
Windows Indexing Configuration Guide
Fix VSCode Terminal Not Opening with Git Bash
Docker Desktop Engine Stopped on Mac M1: Fixes That Work
How to Fix Chrome DNS Error via Router
How to Resolve DNS Probe Finished NXDOMAIN
Reduce Memory Usage When Reading Large CSV with Pandas
Fix 'No Space Left on Device' with Docker Devicemapper
How to Stop Chrome from Hogging RAM
Chrome Sync Not Working After Disabling Extensions: Fixes
Fix 'Python Command Not Found' After Windows Installation
PowerShell Venv Activation Not Working
Windows Indexing Configuration Guide
Fix VSCode Terminal Not Opening with Git Bash
Docker Desktop Engine Stopped on Mac M1: Fixes That Work
How to Fix Chrome DNS Error via Router
How to Resolve DNS Probe Finished NXDOMAIN
Reduce Memory Usage When Reading Large CSV with Pandas
Fix 'No Space Left on Device' with Docker Devicemapper
How to Stop Chrome from Hogging RAM
Chrome Sync Not Working After Disabling Extensions: Fixes
Fix 'Python Command Not Found' After Windows Installation