Openshift 3.7 upgrade fails with "|failed expects hostvars is a dict"

Issue

Error when upgrading from v3.7.57 to v3.7.62 using Automated In-place Cluster Upgrade:

# ansible-playbook -i hosts /usr/share/ansible/openshift-ansible/playbooks/byo/openshift-cluster/upgrades/v3_7/upgrade.yml

...

TASK [openshift_node_facts : Set node facts] ***********************************************************************************************************************************************
fatal: [master1.example.com]: FAILED! => {"msg": "|failed expects hostvars is a dict"}

NO MORE HOSTS LEFT *************************************************************************************************************************************************************************

NO MORE HOSTS LEFT *************************************************************************************************************************************************************************
    to retry, use: --limit @/usr/share/ansible/openshift-ansible/playbooks/byo/openshift-cluster/upgrades/v3_7/upgrade.retry

PLAY RECAP *********************************************************************************************************************************************************************************
master1.example.com          : ok=204  changed=23   unreachable=0    failed=1   
master2.example.com          : ok=99   changed=8    unreachable=0    failed=0   
master3.example.com          : ok=99   changed=8    unreachable=0    failed=0   
node1.example.com            : ok=99   changed=8    unreachable=0    failed=0   
node2.example.com            : ok=99   changed=8    unreachable=0    failed=0   
node3.example.com            : ok=99   changed=8    unreachable=0    failed=0   
infra1.example.com           : ok=118  changed=10   unreachable=0    failed=0   
infra2.example.com           : ok=112  changed=10   unreachable=0    failed=0   
infra3.example.com           : ok=112  changed=10   unreachable=0    failed=0   
localhost                    : ok=26   changed=0    unreachable=0    failed=0   



Failure summary:

  1. Hosts:    master1.example.com
     Play:     Drain and upgrade master nodes
     Task:     Set node facts
     Message:  |failed expects hostvars is a dict