Thank you for your response.
I have contacted my registrar (Namecheap) and pointed them to your comments. Here is the response:
"In such case, we can recommend the DNS provider as the .DE domain names have specific requirements for the DNS zone file creation.
The DNS provider (Ezoic in this case) has the authority over managing the zone file of the domain during the DNS connection.
However, .DE domain names require the zone file to be created even before the DNS connection is initiated.
For that, we can recommend contacting Ezoic services to complete the zone creation as only they can do that before the DNS connection.
The reason the DNS zone is not being created is that the .DE domain names have a requirement that the zone is created before the domain is pointed to their services.
Unfortunately, we cannot create the Ezoic's DNS zone for your domain on our end, only Ezoic services can do that."