How to Fix Cloudflare Origin Certificate Validation Failed
If you see a "validation failed" error when setting up or using a Cloudflare Origin Certi...
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All notesFix Cloudflare Origin Certificate Error After SSL Change
You changed your SSL/TLS setting in Cloudflare (for example, from Flexible to Full or Full Strict...
Fix Windows Defender Real-Time Protection Not Running
You open Windows Security and see a yellow warning: "Real-time protection is off." Or you...
Fix Nginx 502 Bad Gateway: Upstream Connection Refused
If you're seeing a 502 Bad Gateway error with "upstream connection refused" in your N...
Fixing Cloudflare 521 Error: Origin Unreachable
When you see Cloudflare error 521, it means your origin server is refusing the connection from Cl...
Fix Docker Desktop Engine Stopped After Sleep Mode
You wake your computer from sleep, open Docker Desktop, and see the engine is stopped. The whale ...
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