Hi @bonellia
checking your domain you have ipv4 and ipv6 - addresses - https://check-your-website.server-daten.de/?q=kril.live
There
you see: Letsencrypt prefers ipv6 checking your domain.
But your server block
doesn't have an ipv6 listen. Add
listen [::]:80;
restart your nginx, then try it again.