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 notesHow to Set Node.js Max Heap Size Permanently
If your Node.js process crashes with memory errors like FATAL ERROR: CALL_AND_RETRY_LAST Al...
Fix Python Permission Denied When Installing Virtualenv with Pip
When you run pip install virtualenv and see a Permission denied err...
How to Fix pnpm ENOENT Error (Practical Steps)
When you see an ENOENT error with pnpm, it usually means the system cannot find a file or directo...
Fix Chrome Access Violation on Startup – Step-by-Step Guide
If Chrome crashes on startup with an access violation error, it usually means a ...
Fix Cloudflare Wildcard Subdomain Page Rule Not Working
You set up a wildcard subdomain page rule in Cloudflare—like * .example.com/*—but it...
Issue queue
SitemapTroubleshoot Windows Update Service Not Running (Group Policy)
Resolve Chrome Status Access Violation Error Guide
Fix Chrome Extensions Not Loading with a Reset
Git Clone Fails with Timeout in VS Code
Fix Nginx Configuration Test Failure for Upstream Directive
Windows Update Error 0x80070005: Registry Permissions Fix
Chrome Sync Not Working on Family Link? Here's the Fix
How to Fix Nginx Upstream Connection Refused
How to Fix ERR_NAME_NOT_RESOLVED in Chrome (Network Steps)
Windows 11 Taskbar Icon Reset Guide
Non Fast Forward Error Troubleshooting
Fix Edge Sync Not Working with Family Safety
Resolve Chrome Status Access Violation Error Guide
Fix Chrome Extensions Not Loading with a Reset
Git Clone Fails with Timeout in VS Code
Fix Nginx Configuration Test Failure for Upstream Directive
Windows Update Error 0x80070005: Registry Permissions Fix
Chrome Sync Not Working on Family Link? Here's the Fix
How to Fix Nginx Upstream Connection Refused
How to Fix ERR_NAME_NOT_RESOLVED in Chrome (Network Steps)
Windows 11 Taskbar Icon Reset Guide
Non Fast Forward Error Troubleshooting
Fix Edge Sync Not Working with Family Safety