Error 522 only in wp-admin

Hi, I have problem after installing wordfence

on my site: https://www.rafalszrajnert.pl/

when I am logged in every time I do some action I get 522 error. When I am not logged in website works okay

link to screenshot:
https://ibb.co/T80Djvq

In options I checked ->Use the Cloudflare “CF-Connecting-IP” HTTP header to get a visitor IP. Only use if you’re using Cloudflare.

because I am on cloudflare,

plus another thing, website whan I am logged in is working very slow and gives 522

ADDITIONAL INFO:
I aked this question on wordfence forum, https://wordpress.org/support/topic/error-522-only-in-wp-admin/
they said it is cludflare error

That’s not quite what they said. They said to check with your host.

A 522 error typically happens when Cloudflare requests to the origin (your webserver) get blocked. Review the suggestions in this Community Tip for troubleshooting ideas.

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