How to Fix Nginx 'Upstream Connection Refused' Error
When Nginx returns a 502 Bad Gateway with upstream connection refused in the error l...
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 Windows Update Error 0x80070002 with a Clean Boot
If you see error 0x80070002 when running Windows Update, it usually means a file or resource that...
Fix Git SSL Certificate Verify Failed: Unable to Get Local Issuer
When you see fatal: unable to access '...': SSL certificate problem: unable to get ...
Fixing Node Version Mismatch with package.json Engines
You run npm install or node app.js and see a warning or error about the...
How to Update Node Version for Package Compatibility
When you run npm install and see warnings about engine incompatibility or errors lik...
Fixing Nginx Permission Denied on Mounted Drive
When you mount an external drive and point Nginx to serve files from it, you may get a 403 Forbid...
Issue queue
SitemapFix Remote Desktop Connection Failed: Permission Denied
How to Resolve Windows 11 Update Freeze at 0%
Docker Compose: Fix Environment Variables with Special Chars
Windows 11 Installation Assistant Stuck at 99% Disk Space
Firefox Secure Connection Failed Troubleshooting Steps
RDP Setup Guide: 10 Steps for Windows
Fix Nginx Upstream Connection Refused Error
Fix npm run Build Failures: Step-by-Step Checklist
Fix VS Code Permission Denied Error Code 13
How to Manually Remove a Stuck Git index.lock File
VS Code GitHub Login Error: Authentication Failed
Fix Windows Update Error 0x80070002: Missing File
How to Resolve Windows 11 Update Freeze at 0%
Docker Compose: Fix Environment Variables with Special Chars
Windows 11 Installation Assistant Stuck at 99% Disk Space
Firefox Secure Connection Failed Troubleshooting Steps
RDP Setup Guide: 10 Steps for Windows
Fix Nginx Upstream Connection Refused Error
Fix npm run Build Failures: Step-by-Step Checklist
Fix VS Code Permission Denied Error Code 13
How to Manually Remove a Stuck Git index.lock File
VS Code GitHub Login Error: Authentication Failed
Fix Windows Update Error 0x80070002: Missing File