The Cluster contains no hosts satisfying the soft VM/host affinity rules constraint for VM
I came across this error recently that baffled me for a few minutes. I've several DRS Rules which cover Stretched Cluster Datastore/Site Affinity to ensure Uniform configuration but also some Database specific ones to pin VMs that use Application level replication and don't need to move around as much. I had a few test VMs and two were affected:
Might help someone else out! I've since updated the VMTools in the Template where they came from the resolve once and for all!