In Red Hat OpenStack Platform, tripleo-ansible-inventory --list fails with: Error creating inventory: argument of type 'NoneType' is not iterable

Solution In Progress - Updated -

Issue

In Red Hat OpenStack Platform, tripleo-ansible-inventory --list fails with: Error creating inventory: argument of type 'NoneType' is not iterable:

(undercloud) [stack@undercloud-1 ~]$ /usr/bin/tripleo-ansible-inventory --list
Error creating inventory: argument of type 'NoneType' is not iterable

Environment

Red Hat OpenStack Platform

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