The DDNS obtained in the domain of myddns.rocks cannot be used.
Are you having any problems?
Myddns.rocks is not in the TopLevel used for DDNS registration. Is it no longer available?

I am having the same issue, this is the response I have received from support.

"There is an issue at the .rocks registry which is causing an issue with resolution of myddns.rocks domain name. We are working with the registry Network Solutions to resolve this issue."

My Control Panel shows the following message: "There are technical issues at the registry level with *.myddns.rocks and we are working with the .rocks registry to resolve the issue. We apologize for the inconvenience. Thank you for your patience."

I've the same problem with my myddns.rocks domain.

Ping request could not find host mydomain.myddns.rocks. Please check the name and try again.

I have the same problem.

same for me

I asked dynu support.
We received the following answers.

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There is an issue at the .rocks registry which is causing an issue with
resolution of myddns.rocks domain name. We are working with the registry to resolve this issue.

This issue only affects myddns.rocks domain name so you can obtain another
third level domain name using the link below:

​[1]https://www.dynu.com/ControlPanel/AddDDNS
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So far, there seems to be no other way but to change to another domain ...

It seems that the problem has not been solved even now.

Yip still not solved, I suspect all is lots with this domain

It seems working now!

Yes, my myddns.rocks domain is working as well.

Same problem again?
Also, alarmingly, my *.myddns.rocks domain appers to have gone missing here: https://www.dynu.com/en-US/ControlPanel/DDNS

Am i only one with this problem?

Solved.