I get Error 522 on my website that uses Cloudflare

Firstly, my website – dojotech(dot).ro – started to gain a lot of traffic suddenly and became completely inaccessible.

People from the host advised me to connect Cloudflare to my website and to enable Attack Mode.

Which I did, but the results were pretty much the same.

It started to show a Cloudflare page for bot verification, but after the verification, an Error 522 started to appear.

The website is still inaccessible, even after I added the Cloudflare IPs in the .htaccess file in public_html for whitelisting.

Any advice? I am leaving a screenshot here without showing the IP of my server; it’s the same IP on every A record and is the correct one.