Oh and subsequently, we see this in building images, too:
P: Begin executing hacks... update-initramfs: Generating /boot/initrd.img-5.4.0-14-generic cryptsetup: WARNING: Couldn't determine root device cryptsetup: ERROR: Couldn't resolve device /dev/vdb cp: cannot create regular file '/var/tmp/mkinitramfs_2hUbHg/usr/share/plymouth/themes/spinner/watermark.png': No such file or directory E: /usr/share/initramfs-tools/hooks/plymouth failed with return 1. update-initramfs: failed for /boot/initrd.img-5.4.0-14-generic with 1.
Oh and subsequently, we see this in building images, too:
P: Begin executing hacks... img-5.4. 0-14-generic mkinitramfs_ 2hUbHg/ usr/share/ plymouth/ themes/ spinner/ watermark. png': No such file or directory initramfs- tools/hooks/ plymouth failed with return 1. img-5.4. 0-14-generic with 1.
update-initramfs: Generating /boot/initrd.
cryptsetup: WARNING: Couldn't determine root device
cryptsetup: ERROR: Couldn't resolve device /dev/vdb
cp: cannot create regular file '/var/tmp/
E: /usr/share/
update-initramfs: failed for /boot/initrd.