I've set up ddns-scripts with no-ip.com. I'm using 19.07.03, fresh (no saved settings). I add all my info, but I get uclient-fetch error '8' in the logs. So I try copy/pasting the output of the command from the log and get an http error 401. The command used address no-ip.pl as the update address.
When I go to no-ip.com their support says the following address is correct:
http://dynupdate.no-ip.com/nic/update
Source: https://www.noip.com/integrate/request.
I run the same command from command line, substituting the address from no-ip.com and it works. Is it possible that script needs to be updated?
Are you using the USA service, or the Polish service?
I think you set the wrong No-IP.