continue password: `universalblue` enroll mok
continue
password:
enroll mok
password:
universalblueenroll mok
universalblue

ujust enroll-secure-boot-keyujust configure-grub
ujust enroll-secure-boot-keyujust

ujust configure-grub fix then since you got an update while doing the commands it seems
ujust enroll-secure-boot-keyujust enroll-secure-boot-keyujust configure-grubujustujust configure-grub fix