Any way to fix "grub_calloc" not found from the grub rescue prompt?

[Leroy Tennison]

I think the culprit to the is molly-guard.  At the end of do-release-upgrade a reboot prompt appears but do-release-upgrade won't allow answering the molly-guard prompt so you're left with exiting the install or some other option.  Is there any way to fix this short of booting to install media?  Due to a number of issues we have to visit the physical site to do that.  Thanks for your help.
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