This bug was fixed in the package grub2-signed - 1.66.23
--------------- grub2-signed (1.66.23) xenial; urgency=medium
* Rebuild against grub2 2.02~beta2-36ubuntu3.23. (LP: #1840686)
-- Eric Desrochers <email address hidden> Tue, 05 Nov 2019 00:43:00 +0000
This bug was fixed in the package grub2-signed - 1.66.23
---------------
grub2-signed (1.66.23) xenial; urgency=medium
* Rebuild against grub2 2.02~beta2- 36ubuntu3. 23. (LP: #1840686)
-- Eric Desrochers <email address hidden> Tue, 05 Nov 2019 00:43:00 +0000