Table of contents
What is a Cloudflare 520 Error?
The Cloudflare 520 error code is similar to an HTTP server error code. The Cloudflare worker returns these errors when they’re unable to complete their task. There is no HTTP server error code 520, it’s a specific Cloudflare error code, here’s the definition.
520 Web Server Returned an Unknown Error
The origin server returned an empty , unknown, or unexplained response to Cloudflare
You can read more about Cloudflare’s 520 Error on their support site.