Cloudflare Domain - Error 522

Hello,

I manage my public domains with Cloudflare and I set up a subdomain for Univention.

In Univention I set up a DNS Zone and host records for my domain, IPs and I tried to add NS (nameservers of Cloudlfare)

When I try to reach the subdomain I receive error 522.

Can you help?

Thanks.

Mastodon