This issue is caused by attempting to limit the number of virtual machines that can be powered on by setting the advanced parameter VMkernel.Boot.maxVMs to a value of less than 7.
To verify the VMkernel.Boot.maxVMs parameter:
- Click the ESXi host.
- Click the Configuration tab.
- Click Advanced Settings.
- In the Advanced Settings list, click on VMkernel.
- Locate the parameter VMkernel.Boot.maxRegisteredVMs.
- Ensure that the value is set to a value of 7 or higher.
Note: The default value is 0.