This bug was fixed in the package grub2-signed - 1.106
--------------- grub2-signed (1.106) cosmic; urgency=medium
* Rebuild against grub2 2.02+dfsg1-5ubuntu4. (LP: #1792575)
-- Mathieu Trudel-Lapierre <email address hidden> Mon, 17 Sep 2018 08:47:45 -0400
This bug was fixed in the package grub2-signed - 1.106
---------------
grub2-signed (1.106) cosmic; urgency=medium
* Rebuild against grub2 2.02+dfsg1- 5ubuntu4. (LP: #1792575)
-- Mathieu Trudel-Lapierre <email address hidden> Mon, 17 Sep 2018 08:47:45 -0400