How to Fix Cloudflare 521 Error with Firewall Settings
If you see a 521 Web Server Is Down error when visiting your site through Cloudf...
Software troubleshooting desk
Practical fixes for tool errors, setup blocks, and workflow issues.
Symptom
Cause
Fix route
Verify
Fresh repair notes
All notesFix Windows 11 WiFi No Internet Due to Antivirus Blocking
If your Windows 11 PC shows full WiFi bars but no internet access, your antivirus might be blocki...
Fix Nginx Upstream Connection Refused in Docker
You have Nginx running, either on the host or in a container, proxying to another Docker containe...
Fix VS Code Terminal Not Working After Update
After a VS Code update, the integrated terminal may fail to start, show a blank window, or displa...
Fix Node Sass Build Failure: Environment Variable Errors
When you run npm install or a build script and see an error like Node Sass doe...
Fix Windows Update Error 0x80070002 After Update
After a Windows Update, you may see error 0x80070002. This usually means the system can't fin...
Issue queue
SitemapHow to Stop Windows Defender Real-Time Protection from Turning Off
Python Virtual Environment Dependency Fix
How to Fix Python Not Recognized in Windows 7
Docker Container Exits Immediately: Diagnosing Out of Memory
How to Fix Git index.lock File Exists Error on Mac
Resolve Git Push Rejected Error
Fix Docker Compose Environment Variable Substitution
Docker Container Exits at Startup: Entrypoint Troubleshooting
Troubleshooting Blue Screen Crashes Post Windows 11 Update
How to Reclaim Docker Disk Space for Images
Troubleshoot Firefox Secure Connection Warnings
How to Fix Python MemoryError When Generating Large Files
Python Virtual Environment Dependency Fix
How to Fix Python Not Recognized in Windows 7
Docker Container Exits Immediately: Diagnosing Out of Memory
How to Fix Git index.lock File Exists Error on Mac
Resolve Git Push Rejected Error
Fix Docker Compose Environment Variable Substitution
Docker Container Exits at Startup: Entrypoint Troubleshooting
Troubleshooting Blue Screen Crashes Post Windows 11 Update
How to Reclaim Docker Disk Space for Images
Troubleshoot Firefox Secure Connection Warnings
How to Fix Python MemoryError When Generating Large Files