The sha512sums file (Download Whonix-XFCE-15.0.0.7.1.sha512sums (whonix-kvm)) has a bunch of irrelevant errors about permission-lockdown:
f5521a643984bdd60263229f8f8aeecdc803392ea04378327c4eb2afe25511b273c946a58f514e175a9180be376dec98302226b392424e8fcdc7d92f14452234 Whonix-XFCE-15.0.0.7.1.libvirt.xz
mkdir: cannot create directory '/var/cache/security-misc': Permission denied
/usr/lib/security-misc/permission-lockdown: chmod o-rwx "/home/user"
touch: cannot touch '/var/cache/security-misc/state-files/user': No such file or directory
mkdir: cannot create directory '/var/cache/security-misc': Permission denied
/usr/lib/security-misc/permission-lockdown: chmod o-rwx "/home/user"
touch: cannot touch '/var/cache/security-misc/state-files/user': No such file or directory
cc @HulaHoop