Unisphere issue affecting Ansible for Dell EMC PowerMax v1.1: 500 error when attempting certain hosts tasks

A customer was seeing the following error reported when trying to run a playbook:

The status code received is 500 and the message is {'message': 'A problem occurred creating the host resource: null'

The issue is related to a known Unisphere issue at version 9.0 and is corrected at Unisphere version 9.1.

This is the related Unisphere KB:

    https://support.emc.com/kb/541426

And an Ansible KB was written as well for this issue:

Ansible: Ansible for Dell EMC PowerMax v1.1 we get a 500 error when attempting certain hosts tasks
https://support.emc.com/kb/544698