Dynamic DNS resolution failure ..... NO-IP.INFO

I went from IPCOP to IPFIRE … successfully … but I have this unexpected error, at the initial boot, I am connected to ONT FibraCity in fixed IP with opening on ipv4 …

Apr 9 11:55:01 ipfire20 ddns[2599]: An update has not been performed because earlier updates failed for radioluna.no-ip.info
Apr 9 11:55:01 ipfire20 ddns[2599]: Last failure message:
Apr 9 11:55:01 ipfire20 ddns[2599]: DDNSAuthenticationError: Authentication against the server has failed
Apr 9 11:55:01 ipfire20 ddns[2599]: Further updates will be withheld until 2020-04-09 21:52:37.202236
Apr 9 11:55:01 ipfire20 ddns[2599]: An update has not been performed because earlier updates failed for cronora.myftp.org
Apr 9 11:55:01 ipfire20 ddns[2599]: Last failure message:
Apr 9 11:55:01 ipfire20 ddns[2599]: DDNSAuthenticationError: Authentication against the server has failed
Apr 9 11:55:01 ipfire20 ddns[2599]: Further updates will be withheld until 2020-04-09 21:52:37.989712
Apr 9 11:55:01 ipfire20 ddns[2599]: An update has not been performed because earlier updates failed for petroleum.ddns.net
Apr 9 11:55:01 ipfire20 ddns[2599]: Last failure message:

I don’t know how to solve it, obviously I have already checked credentials for dynamic DNS, I have the IPIFIRE DNS in TLS and everything is ok …

Then in the IPFIRE management page near the IP I have this message “undefined.hostname.localhost” it is evident that there is some problem in DNS resolution … but I don’t understand …

I really need some ideas …