rp4vm connect remote cluster cause error "vcServerUuid is marked @NonNull but is null"

HI

I have create 2 site and both have vCenter 、 vRPA cluster 、plugin Server 

when I connect to site 

and try Protect VM

I got error "vcServerUuid is marked @NonNull but is null"

why ?

both vCenter is Version:7.0.1.00300

ESXi VMware ESXi, 6.7.0, 17167734

vRPA version:5.3.SP1.P1(m.148)

Site A    

https://imgur.com/a/zvwv9zU

Site B

https://imgur.com/d5UFyon

both site try Protect VM got error 

https://imgur.com/vM0TCnr