This bug was fixed in the package grub2-signed - 1.66.1
--------------- grub2-signed (1.66.1) xenial; urgency=medium
* Rebuild against grub2 2.02~beta2-36ubuntu3.1. (LP: #1574727)
-- Mathieu Trudel-Lapierre <email address hidden> Thu, 12 May 2016 09:46:16 -0400
This bug was fixed in the package grub2-signed - 1.66.1
---------------
grub2-signed (1.66.1) xenial; urgency=medium
* Rebuild against grub2 2.02~beta2- 36ubuntu3. 1. (LP: #1574727)
-- Mathieu Trudel-Lapierre <email address hidden> Thu, 12 May 2016 09:46:16 -0400