ESXi performance data is currently not available for this entity

I am running ESXi 6.0 U2 and vCenter 6.0 U2. I am able to see ESXi performance up to Past day, but when I chose rest of the options (Past Week, Past Month and Custom), it gives me this error "esxi performance data is currently not available for this entity".  It is happening to all hosts.

I restart the NTP service to one host and try same result.

Any idea?

Thanks,

Moo