Hi,

Well, its mostly seen in VCSA6.0 (vCenter appliance)

Resolution is to check the status of VMware vCenter Workflow Manager Services on VCSA

First verify the disk size by using df -vh and see if there any disk which is about to 100%

Most of the time disk is full at /storage/log. Try to clear the space and then try to start the workflow service by using below steps.

Please find below steps to follow

1) Login to VCSA via Putty.

2) shell.set --enabled True

3) service-control --status vmware-vpx-workflow

4) If its showing stop. Start the same by below command

service-control --start vmware-vpx-workflow.

Now try to power on the vm from vCenter.

-Sachin