Cannot start imported Hyper-V VM: The Security ID structure is invalid (0x80070539).

I haven't seen any mention of this in any of the forums. I'm attempting to import a virtual machine to a Server 2012 R2 Hyper-V system. Normally this is fairly straight-forward. However, the imported virtual machine will not start. I'm getting the following error message:

[Window Title]
Hyper-V Manager

[Main Instruction]
An error occurred while attempting to start the selected virtual machine(s).

[Content]
'Unnamed VM' could not initialize.

An attempt to read or update virtual machine configuration failed.

[Expanded Information]
'Unnamed VM' could not initialize. (Virtual machine ID )

'Unnamed VM' could not read or update virtual machine configuration: The security ID structure is invalid. (0x80070539). (Virtual machine ID 223C7883-08C2-43ED-B5D1-7ABFC0940F64)

I'm not familiar with what is going on here. Any ideas?

Thank you.