"CalledProcessError() Press ENTER to logout" when installing RHEV Hypervisor

Solution Verified - Updated -

Issue

When trying to install RHEV-H ISO and after selecting the disk drive , this error happens:

"An error appeared in the UI: CalledProcessError()
Press ENTER to logout...
or enter 's' to drop to shell"

Environment

Red Hat Enterprise Virtualization (RHEV) 3.x
RHEV Hypervisor 6.x
Issue noticed on HP hardware

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