Fix Nginx Upstream Connection Refused Behind Cloudflare
If you see upstream connection refused in your Nginx error logs while using Cloudfla...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesGit index.lock File Exists Even After Deleting: Fixes
You delete the .git/index.lock file, but Git still says it exists. This can happen d...
Fixing Nginx 502 Bad Gateway in Docker WordPress Setups
If you're running WordPress in Docker behind an Nginx reverse proxy, a 502 Bad Gateway error ...
Fix DNS Probe Finished NXDOMAIN on Custom DNS Server
If you see “DNS PROBE FINISHED NXDOMAIN” in Chrome or another browser while using a custom DNS se...
Cloudflare SSL Full Strict Not Working? Try These Fixes
You've set Cloudflare SSL/TLS encryption mode to Full (Strict), but your site shows a secure ...
Fix Chrome Certificate Error: Invalid Authority with Proxy Settings
You open Chrome and see NET::ERR_CERT_AUTHORITY_INVALID on every site, even trus...
Issue queue
SitemapCloudflare Origin Certificate Setup for cPanel
Taskbar Icons Disappeared After Windows Update Fix
Fix BSOD After Memory Diagnostic on Windows 11
Fix Edge Sync Permission Denied Error
Chrome Print Error Access Violation Guide
Python Dependency Conflict Troubleshooting Guide
How to Remove Git index.lock File on Linux
Fix VSCode Permission Denied on Save in Linux
Resolve 'Permission denied' for Python pip User Install
Windows 11 Wi-Fi Limited Connectivity Troubleshooting Guide
How to Resolve Nginx Permission Denied on Root
How to Fix Git Clone Connection Timed Out Error
Taskbar Icons Disappeared After Windows Update Fix
Fix BSOD After Memory Diagnostic on Windows 11
Fix Edge Sync Permission Denied Error
Chrome Print Error Access Violation Guide
Python Dependency Conflict Troubleshooting Guide
How to Remove Git index.lock File on Linux
Fix VSCode Permission Denied on Save in Linux
Resolve 'Permission denied' for Python pip User Install
Windows 11 Wi-Fi Limited Connectivity Troubleshooting Guide
How to Resolve Nginx Permission Denied on Root
How to Fix Git Clone Connection Timed Out Error