FFU13-16.1: When performing a LEAPP upgrade, during the automatic reboot the servers go into the emergency shell

Solution Verified - Updated 2021-04-16T10:09:32+00:00 -

Issue

FFU 13 to 16.1 when doing leapp upgrade on nodes then server is not booting and going into emergency shell.
Efi machines fail to boot after leapp due to grub2 failing to read grubenv.

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