This bug was fixed in the package grub2-signed - 1.93.10
--------------- grub2-signed (1.93.10) bionic; urgency=medium
* Rebuild against grub2 2.02-2ubuntu8.9 (LP: #1784363) (LP: #1788727)
-- Mathieu Trudel-Lapierre <email address hidden> Thu, 08 Nov 2018 10:54:58 -0500
This bug was fixed in the package grub2-signed - 1.93.10
---------------
grub2-signed (1.93.10) bionic; urgency=medium
* Rebuild against grub2 2.02-2ubuntu8.9 (LP: #1784363) (LP: #1788727)
-- Mathieu Trudel-Lapierre <email address hidden> Thu, 08 Nov 2018 10:54:58 -0500