This is a grub bug and it is being tracked here:
[SRU] unable to boot guest with large memory when SEV is enabled on host https://bugs.launchpad.net/ubuntu/+source/grub2-unsigned/+bug/1989446
This is a grub bug and it is being tracked here:
[SRU] unable to boot guest with large memory when SEV is enabled on host /bugs.launchpad .net/ubuntu/ +source/ grub2-unsigned/ +bug/1989446
https:/