Which T4O version am I running?

sudo docker ps -a | grep -Ei 'trilio|tvault|workloadmgr|s3|dmapi|dm_api|datamover|data_mover|contego' # both controllers and computes # if RHOSP 16 or higher, use 'podman'

Then, compare the versions with the official documentation [1]. Navigate through the different hotfixes to find the one that matches all the versions of your WLM elements.

[1] https://docs.trilio.io/openstack/v/tvo-4.2/triliovault-4.2-release-notes