Fix Docker Nginx 502 Bad Gateway with MySQL
You have a Dockerized web app behind Nginx, and you're seeing a 502 Bad Gateway error. The ap...
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 Cloudflare 521 Error with Wildcard Subdomains
If you're seeing a Cloudflare 521 error on a wildcard subdomain (e.g., *.example.com), the or...
How to Fix Chrome ERR_CONNECTION_RESET with DNS Flush
If Chrome shows ERR_CONNECTION_RESET, the connection was interrupted. This often...
Fix Docker Compose Port Already Allocated on Linux
You run docker-compose up and get an error like Error starting userland proxy:...
How to Fix Cloudflare 522 Errors: Connection Timeout Guide
You're trying to load your site and see Error 522: Connection Timed Out. Thi...
How to Fix Docker Container Exits Immediately with Permission Denied
You start a Docker container, but it exits immediately. Running docker logs shows a ...
Issue queue
SitemapWindows 11 Update Stuck at 0%? Run System File Checker First
How to Fix ERR_CONNECTION_RESET When Firewall Blocks Chrome
Docker Container Exits Right After Start with Volume Mount
Git Detached HEAD Push to Remote Branch
Fix Nginx Configuration Test Failed: Duplicate Listen Error
Fix Nginx Redirect Loop After SSL Certificate Install
Firefox Date and Time Secure Connection Error Guide
Troubleshooting Docker Compose Environment Variable Precedence
Troubleshoot RDP Error Code 0x204
Windows 11 WiFi No Internet? Antivirus May Be Blocking It
Fix Chrome Certificate Error Invalid Authority on Mac
VSCode IntelliSense Not Working for JavaScript: Fixes
How to Fix ERR_CONNECTION_RESET When Firewall Blocks Chrome
Docker Container Exits Right After Start with Volume Mount
Git Detached HEAD Push to Remote Branch
Fix Nginx Configuration Test Failed: Duplicate Listen Error
Fix Nginx Redirect Loop After SSL Certificate Install
Firefox Date and Time Secure Connection Error Guide
Troubleshooting Docker Compose Environment Variable Precedence
Troubleshoot RDP Error Code 0x204
Windows 11 WiFi No Internet? Antivirus May Be Blocking It
Fix Chrome Certificate Error Invalid Authority on Mac
VSCode IntelliSense Not Working for JavaScript: Fixes