I can't configure my dynamicdns

I’ve configured my NextcloudPi and everything went fine. But now I can’t configure my dynamicdns (noip) to my NextCloudPi. Everytime I try this, my NextCloudPi says the following error:

Did you try following documentation on ownyourbits.com or docs.nextcloud.com
There are guides walking you through the process. Also, chat at https://t.me/nextcloudpi

I’m still on the same error. :frowning: