I have a .de Domain that i haved managed for some time now with Dynadot. But i often get the error:
Name servers for DE domains must respond to DNS queries for the domain before being set.
when i try to change my DNSSEC Record or the IP of my Namerservers.
I'm aware of this help section: https://www.dynadot.com/community/help/question/set-nameservers-DE and the Pre-delegation Check from Denic gives me a Check successful.
My nameservers are working fine, they are in different countries, and all namerserver checks online give me a green light. This seems to be a common problem in the forums.
It seems that this is more a problem of dynadot and not my nameservers.
Also: Adding a second DNSSEC Record gives a Server Error: "There has been an internal error in our server. An email has been sent to our technical team who will resolve the problem as soon as possible. Please try your request again later. We are sorry for the inconvenience."