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 notesFix Node Sass Build Failed with Visual Studio Build Tools
When you see node-sass build failed during an npm install, it usually means the nati...
Fix Git 'index.lock' File Exists Error on Linux
When working with Git on Linux, you might see an error like:
fatal: Unable to creat...Fixing Cloudflare 521 Error: Origin Unreachable
When you see Cloudflare error 521, it means your origin server is refusing the connection from Cl...
Cloudflare Origin Certificate Setup for Apache
If you use Cloudflare's proxy (orange cloud), you can set up an origin certificate to encrypt...
How to Fix Nginx 502 Bad Gateway in Docker Compose
If you're running an application with Docker Compose and Nginx as a reverse proxy, a 502 Bad ...
Issue queue
SitemapFix Python UnicodeDecodeError for sys.stdin Input
Resetting SoftwareDistribution to Fix Update Error 0x80070002
Chrome Memory Saver Mode Not Working: Quick Fixes
Troubleshooting Port Already Allocated in Docker Compose
Fix Windows Update Service Not Running with DISM Restore Health
Fix Nginx 502 Bad Gateway with Docker and PHP-FPM
Chrome Crash Fix: Turn Off Hardware Acceleration for Access Violation
Enable Windows Defender Real-Time Protection via Group Policy
Nginx Permission Denied After Restart: Fixes That Work
Resolving Python Dependency Conflicts Between Requirements Files
Fix Windows Search Indexing High CPU Usage
Git Merge Conflict: How to See the Diff Between Versions
Resetting SoftwareDistribution to Fix Update Error 0x80070002
Chrome Memory Saver Mode Not Working: Quick Fixes
Troubleshooting Port Already Allocated in Docker Compose
Fix Windows Update Service Not Running with DISM Restore Health
Fix Nginx 502 Bad Gateway with Docker and PHP-FPM
Chrome Crash Fix: Turn Off Hardware Acceleration for Access Violation
Enable Windows Defender Real-Time Protection via Group Policy
Nginx Permission Denied After Restart: Fixes That Work
Resolving Python Dependency Conflicts Between Requirements Files
Fix Windows Search Indexing High CPU Usage
Git Merge Conflict: How to See the Diff Between Versions