How to Fix Nginx Upstream Connection Refused on Port 80
When nginx logs show "upstream connection refused" while connecting to port 80, it means ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix 'fatal: refusing to merge unrelated histories' in Git
You cloned a repository, made some commits locally, and now when you try to git pull...
Fix Windows 11 Blue Screen After Update with System Restore
If you're seeing a blue screen after installing a Windows 11 update, System Restore can often...
Setting Up Cloudflare Wildcard Subdomains: A Practical Guide
If you need to route traffic for any subdomain (like *.example.com) to the same server, Cloudflar...
Fix net::ERR_CERT_AUTHORITY_INVALID in Chrome on Android
When browsing on Chrome for Android, you might encounter the error net::ERR_CERT_AUTHORITY_...
How to Set Python Requests Timeout for the Entire Request
When you use the Python requests library, a request can hang indefinitely if the ser...
Issue queue
SitemapPython Requests Timeout Not Working: How to Fix
How to Resolve Git Stash index.lock Error
How to Fix VSCode Terminal Permission Denied for Python Venv
Fix pnpm Store Path Errors
Chrome STATUS_ACCESS_VIOLATION Fix: Disable Hardware Acceleration
Nginx Redirect Loop Troubleshooting Guide
Fix Nginx HTTP to HTTPS Redirect Loop Error
Taskbar Visible But No Icons – Solutions
Understanding DNS Probe NXDOMAIN and Server Not Found
Chrome ERR_NAME_NOT_RESOLVED Network Reset Guide
Debugging Jest Tests in VS Code: Breakpoints Not Hit
Fix Remote Desktop Not Working After Windows Update
How to Resolve Git Stash index.lock Error
How to Fix VSCode Terminal Permission Denied for Python Venv
Fix pnpm Store Path Errors
Chrome STATUS_ACCESS_VIOLATION Fix: Disable Hardware Acceleration
Nginx Redirect Loop Troubleshooting Guide
Fix Nginx HTTP to HTTPS Redirect Loop Error
Taskbar Visible But No Icons – Solutions
Understanding DNS Probe NXDOMAIN and Server Not Found
Chrome ERR_NAME_NOT_RESOLVED Network Reset Guide
Debugging Jest Tests in VS Code: Breakpoints Not Hit
Fix Remote Desktop Not Working After Windows Update