Fix Nginx Upstream Connection Refused Socket Error
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 notesRecover Lost Commits After Git Detached HEAD
You've made commits while in a detached HEAD state, and now you can't see them on any bra...
VS Code Git Not Detecting Changes in Workspace: Fixes
You open VS Code, make edits, and expect to see them in the Source Control panel. But nothing sho...
How to Reset Chrome to Fix ERR_NAME_NOT_RESOLVED
You try to visit a website, but Chrome shows ERR_NAME_NOT_RESOLVED. This usually...
How to Fix Windows Update Error 0x80070002
Windows Update error 0x80070002 usually appears when the system cannot find a required file durin...
Fix Nginx 502 Bad Gateway with Docker Socket
You have an Nginx container proxying requests to another container via the Docker socket, and you...
Issue queue
SitemapHow to Resolve Docker Port Conflicts
Resolve Git index.lock Error That Won't Go Away
How to Fix ERR_NAME_NOT_RESOLVED in Chrome
How to Fix Git SSL Certificate Problem: Unable to Get Local Issuer
Fix Cloudflare Origin Certificate Error After SSL Change
Fix Nginx Configuration Test Failure After SSL Setup
Windows 10 Taskbar Icons Not Showing: Troubleshoot
Fix Windows Update Error 0x80070002
Troubleshooting VS Code Java Language Server Issues
Fix Microsoft Edge Sync Error 0x80070424
Resolve NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode
ERR_CONNECTION_RESET Troubleshooting Guide
Resolve Git index.lock Error That Won't Go Away
How to Fix ERR_NAME_NOT_RESOLVED in Chrome
How to Fix Git SSL Certificate Problem: Unable to Get Local Issuer
Fix Cloudflare Origin Certificate Error After SSL Change
Fix Nginx Configuration Test Failure After SSL Setup
Windows 10 Taskbar Icons Not Showing: Troubleshoot
Fix Windows Update Error 0x80070002
Troubleshooting VS Code Java Language Server Issues
Fix Microsoft Edge Sync Error 0x80070424
Resolve NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode
ERR_CONNECTION_RESET Troubleshooting Guide