Error of domain adding

Hello everyone,
I have tried to set up the certificate SSL to my domain but I have a message that my domain is not properly configurated. I have updated my DNS entries as it was indicated in the email from ovn support, but it did not work.

How should I configurate the domain so that i pointed to the SSL Gateway?
My domain name is oka3games.fr :
My server is with OVHcloud (vps)

Thank you!ssl%20|690x350