Hi. I have a raspberry pi and I followed all the steps on this guide: https://www.dynu.com/DynamicDNS/IPUpdateClient/RaspberryPi-Dynamic-DNS

For some time, everything went fine. But suddenly, the cronjob stopped updating my IPv6 address. IPv4 is updating perfectly fine.

I already have checked the ipv6 network on my Pi, and it is correctly configured. My Pi has an ipv6 address. But this ipv6 address is not getting updated to Dynu.

Could you help me figure out what is going on?