Could not find Zookeeper service (after-reboot)

While running after-reboot on a monolith installation, we're getting the following error:

TASK [zookeeper : start Zookeeper service] **********
fatal: []: FAILED! => {"changed": false, "msg": "Could not find the requested service zookeeper-server: host"}

I do have an entry in my environment under inventory.ini referencing zookeeper:


...however, it seems the Zookeeper service may not be installed or running?
Any help appreciated!