Issue IPv6 unreachable?

[Oldiesmann]

When I moved to my new VPS recently I added the IPv6 address to Plesk as well. I thought all was well and was able to assign it to three different domains. However, it's now saying the IP is not configured properly and won't let me remove it from the affected domains. Clicking the "repair" link does nothing.

If I run "plesk repair" on any of the domains it says the IP address isn't in the server's network interface, but when I login to the shell it specifically shows that one as the IPv6 address for eth0.

I can't remove the IP address from the server since it's assigned to three sites and I can't remove it from the sites because it thinks it's not configured properly.

 

[Oldiesmann]

Here's the contents of /etc/netplan/10-plesk.yaml as well if that's any help.

 

[Oldiesmann]

Any suggestions/recommendations here? I don't specifically need IPv6 but if I've got an address available it would be nice to be able to use it.