'The host does not have sufficient CPU resources to satisfy the reservation.'
IN vCenter 2604 VM's and 49 Host's are there.
Below are the Cluster resource pool
Below are the Hardware details
My CPU requirement is below
How it can fix the issue.
Do you have admission control enabled on the cluster, it sounds like you just dont have enough slots available to allow you to power this on
Check admission control on the cluster, I would image you just don't have enough slots available to power on any more VMs