On occasion, when a new vSAN cluster is deployed, it can fail to get added to the vCenter Storage Policy Service correctly, leaving the entry in an unhealthy state.
To resolve this issue,
1. Restart the Storage Policy Service on the vCenter appliance:service-control --restart vmware-sps
2. If the problem is still in place after restarting the service above, then re-synchronize the storage providers from vCenter by doing the following:
VASA provider registration Troubleshooting
VASA Provider Registration Troubleshooting