How to Fix Cloudflare 521 Error During Setup
If you see a 521 error after setting up Cloudflare, it means your origin server refused the conne...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesDNS Probe Finished NXDOMAIN vs Server Not Found: Key Differences
When you see a 'DNS probe finished NXDOMAIN' or 'Server not found' error in your ...
Fix Nginx 'upstream connection refused' When Talking to PHP-FPM
You're seeing upstream connection refused in your Nginx error log, and your site...
How to Fix Windows Update Error 0x80070005 Permission Denied
When Windows Update fails with error 0x80070005 and the message "Permission denied," it u...
How to Fix Git SSL Certificate Problem: Unable to Get Local Issuer
When you run a Git command and see error: SSL certificate problem: unable to get local issu...
Cloudflare DNS Propagation Not Working with New Domain: Fixes
You registered a new domain, set it up with Cloudflare, but after hours (or days) the site still ...
Issue queue
SitemapChrome Startup Crash Fix: Disable Extensions
Fix Missing Environment Variables in Docker Compose
Docker Compose Env Var Not Refreshing? Fix It
Docker Disk Space Cleanup Guide
Resolve NGINX Upstream Refused SSL Errors
Pip Externally Managed Environment vs Virtual Environment: Fixes
Chrome Sync Stops After Disabling Extensions: Fix
ERR_NAME_NOT_RESOLVED Chrome Error: Troubleshooting Checklist
How to Fix Windows Update Error 0x800f081f
Resolve Windows Security App Permission Problems
Troubleshooting Docker Swarm Network Errors
How to Resolve Permission Denied Errors with pip install
Fix Missing Environment Variables in Docker Compose
Docker Compose Env Var Not Refreshing? Fix It
Docker Disk Space Cleanup Guide
Resolve NGINX Upstream Refused SSL Errors
Pip Externally Managed Environment vs Virtual Environment: Fixes
Chrome Sync Stops After Disabling Extensions: Fix
ERR_NAME_NOT_RESOLVED Chrome Error: Troubleshooting Checklist
How to Fix Windows Update Error 0x800f081f
Resolve Windows Security App Permission Problems
Troubleshooting Docker Swarm Network Errors
How to Resolve Permission Denied Errors with pip install