Thank you for taking the time to report this bug and helping to make Ubuntu better. The relevant dpkg terminal log says:
update-initramfs: Generating /boot/initrd.img-4.4.0-47-generic E: /usr/share/initramfs-tools/hooks/casper failed with return 1.
This hook comes from the casper package. So re-assigning this bug to casper.
Thank you for taking the time to report this bug and helping to make Ubuntu better. The relevant dpkg terminal log says:
update-initramfs: Generating /boot/initrd. img-4.4. 0-47-generic initramfs- tools/hooks/ casper failed with return 1.
E: /usr/share/
This hook comes from the casper package. So re-assigning this bug to casper.