Fixing Nginx Upstream Connection Refused on Port 443
You see "upstream connection refused" in your Nginx error log when proxying requests to p...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesCloudflare Origin Certificate Not Showing in Dashboard: Fix
If you've generated a Cloudflare origin certificate but it doesn't appear in your dashboa...
Docker Container Exits Immediately in Foreground Mode: Fixes
You run a Docker container with docker run -it myimage and it exits immediately. The...
Fix VS Code Breakpoint Not Hit in Express App
You set a breakpoint in your Express route handler, start debugging, and the breakpoint is never ...
Fix Docker Compose Volume Permission Denied Errors
You run docker compose up and see errors like Permission denied when a ...
Python Virtual Environment Not Activating on Mac: Fixes
You open Terminal, run source venv/bin/activate, and nothing happens—or you get an e...
Issue queue
SitemapRouter Settings for ERR_NAME_NOT_RESOLVED
Fix 'fatal: refusing to merge unrelated histories' in Git
Fix Nginx Redirect Loop with Cloudflare
Git Merge Unrelated Histories: When and How to Use --allow-unrelated-histories
How to Resolve RDP Password Expired Issue
Fix Docker Compose 'port 8080 already allocated' Error
Troubleshooting Nginx Log Write Permission Denied
Stop Chrome ERR_CONNECTION_RESET from Extensions
Windows Update Error 0x80070005: Take Ownership Fix
How to Fix DNS Probe Finished NXDOMAIN on Windows 10
Resolve Docker Compose Nginx Port Conflict
Fix Python Permission Denied When Installing Packages
Fix 'fatal: refusing to merge unrelated histories' in Git
Fix Nginx Redirect Loop with Cloudflare
Git Merge Unrelated Histories: When and How to Use --allow-unrelated-histories
How to Resolve RDP Password Expired Issue
Fix Docker Compose 'port 8080 already allocated' Error
Troubleshooting Nginx Log Write Permission Denied
Stop Chrome ERR_CONNECTION_RESET from Extensions
Windows Update Error 0x80070005: Take Ownership Fix
How to Fix DNS Probe Finished NXDOMAIN on Windows 10
Resolve Docker Compose Nginx Port Conflict
Fix Python Permission Denied When Installing Packages