Error 522 running Cloudflare

Answer these questions to help the Community help you with Security questions.

What is the domain name?
Foe example domain https://tvhod.com

Have you searched for an answer?
Yes

Please share your search results url:
https://support.cloudflare.com/hc/en-us/articles/115003011431-Troubleshooting-Cloudflare-5XX-errors

When you tested your domain using the Cloudflare Diagnostic Center, what were the results?
I linked to support page so I cant get a results

My issue
Hi
I host my websites through Fastcomment, and over the last day all my sites are down. I contacted their support, according to them the server is ok, the problem is that when I activate Cloudflare I get a 522 error, when I pause it the sites work without a problem. what could be the problem?

What error message or number are you receiving?
522

What steps have you taken to resolve the issue?

  1. I contacted my hosting, for them there is no problem with the server
  2. I paused Cloudflare and the site worked
  3. I restored Cloudflae the server crashed again

Was the site working with SSL prior to adding it to Cloudflare?

What are the steps to reproduce the error:

Have you tried from another browser and/or incognito mode?
Yes
Please attach a screenshot of the error:

Hello there,

The error could be due to a few reasons. Here’s the details & guide to solve:

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