When deploying VMware Cloud Foundation 9.0.0, the vSAN Witness Appliance is deployed using an expired evaluation license.
The issue occurs in green field vSAN 9.0.0 environments where the witness nodes are deployed using the vSAN Witness OVF.
VMware vSAN 9.0.0
This is a known issue with vSAN Witness OVF 9.0.0 where the build date is the effective start date of the evaluation license.
The issue is resolved in vSAN 9.0.1:
Upgrade to vSAN 9.0.1
Deploy the vSAN witness appliance 9.0.1
Deploy vSAN witness appliance 8.0.3
Upgrade witness appliance to 9.0.0