No Memory detected from Underlying vSphere Infrastructure

Sometimes even after adding the endpoint and triggering the data collection at compute resource still from the underlying Memory info is not available in the vCAC. It shows the status like this:-

One of the reason of this issue is License of the Underlying Infrastructure is expired so in my case how i resolved this issue:-
1. Assigned the License Key to vCenter
2. Assigned the License Key to all the ESXi Hosts
3. Connect the disconnected hosts again
4. Trigger the data collection again from vCAC at Compute Resource