Not able to add new server: IPv6 2003🅰47f:abe4::1

It does output this error:

mtr: mtr-packet reported invalid argument

I tried using regular ICMP probes, which work just fine, but mtr does not send udp probes at all.
I tried several machines with several linux flavors on them like Ubuntu server 18.04, 19.10 and 20.10

IPv6 however is configured correctly and works just fine.