This bug was fixed in the package grub2-signed - 1.66.16
--------------- grub2-signed (1.66.16) xenial; urgency=medium
* Rebuild against grub2 2.02~beta2-36ubuntu3.16. (LP: #722950, #1708245)
-- dann frazier <email address hidden> Thu, 11 Jan 2018 10:04:44 -0700
This bug was fixed in the package grub2-signed - 1.66.16
---------------
grub2-signed (1.66.16) xenial; urgency=medium
* Rebuild against grub2 2.02~beta2- 36ubuntu3. 16. (LP: #722950, #1708245)
-- dann frazier <email address hidden> Thu, 11 Jan 2018 10:04:44 -0700