Loading site error, is it Cloudflare or my free hosting error?

[xlorit]

Hello, I’m getting a lot of this error

Is it from something I might have misconfigured in Cloudflare or is it from my free hosting that might be unstable?

[domjh]

That error is generally caused by the host.

Community Tip - Fixing Error 520: Web server is returning an unknown error

Error Try the suggestions in this Community Tip to help you fix “Error 520: Web server is returning an unknown error”. Background Error 520 is essentially a catch-all response when something unexpected happens or when the origin server incorrectly interprets or does not tolerate a request due to a protocol violation or an empty response. A 520 error occurs when the connection started on the origin web server, but that the request was not completed. The most common reason why this would occur …

Does your site work if you pause Cloudflare?

https://support.cloudflare.com/hc/en-us/articles/200169176-How-do-I-temporarily-pause-Cloudflare-