Failed to get data for 'Host Preparation Status, Host Communication Channel Status'

Hi

We have vcenter 6.7 u1 and nsx 6.4 this message shows in the overview in 'Networking and security' 

plz help me to solve this error

Failed to get data for 'Host Preparation Status, Host Communication Channel Status' : Aggregate Count Widget LabelValueConfiguration_HostCommunicationChannelStatus has an invalid number null. Only numbers are allowed as fields for aggregate_count sub-type.