Fixing Nginx 502 Bad Gateway in Docker Networks
You have an Nginx container proxying requests to another container (like a PHP-FPM or Node app), ...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Git Push Rejected Non Fast Forward Remote Error
You run git push and get: ! [rejected] main -> main (non-fast-forward) erro...
How to Fix an Nginx Redirect Loop: Step-by-Step
You load a site and the browser keeps spinning—eventually showing 'redirect loop' or '...
How to Fix Cloudflare 521 Error (Port 443 Blocked)
When you see a Cloudflare 521 error, it means Cloudflare’s servers cannot connect to your origin ...
Fix Cloudflare 522 Error with Nginx Configuration
You're seeing a Cloudflare 522 error: connection timed out between Cloudflare and your origin...
How to Create a New Branch from a Detached HEAD in Git
If you see a message like "You are in 'detached HEAD' state" in Git, it means you...
Issue queue
SitemapWindows 10 Update Error 0x80070005 Troubleshooting Guide
Fix Nginx Configuration Test Failure from Rewrite Rules
How to Fix Windows Update Error 0x80070002 by Resetting Components
Docker Nginx 502 Bad Gateway Troubleshooting Ubuntu
Dart/Flutter IntelliSense Not Working in VSCode: Fixes
Fix Cloudflare Origin Certificate Mismatch Errors
Git Clone Connection Timed Out: Troubleshooting Checklist
How to Fix Update Error 0x80070005 with Clean Boot
Fix Missing Taskbar Icons in Windows Notification Area
How to Resolve Windows 10 Update Error 0x800f081f
Troubleshoot Chrome Extensions Not Saving Config
How to Fix a Detached HEAD in Git Using SourceTree
Fix Nginx Configuration Test Failure from Rewrite Rules
How to Fix Windows Update Error 0x80070002 by Resetting Components
Docker Nginx 502 Bad Gateway Troubleshooting Ubuntu
Dart/Flutter IntelliSense Not Working in VSCode: Fixes
Fix Cloudflare Origin Certificate Mismatch Errors
Git Clone Connection Timed Out: Troubleshooting Checklist
How to Fix Update Error 0x80070005 with Clean Boot
Fix Missing Taskbar Icons in Windows Notification Area
How to Resolve Windows 10 Update Error 0x800f081f
Troubleshoot Chrome Extensions Not Saving Config
How to Fix a Detached HEAD in Git Using SourceTree