2 node vxrail validate error ,Unable to connect to vCenter Server to retrieve roles.

I  prepare the 2 node direct connect poc Lab ,  Hardware  E560F , version . RASR 4.7.301 , 4x10G 

I follow the solveonline  generate  2 node  Installation Procedures ,

• vcenter  version verify  checked .
• node esxicli portgroup vlan ID changed to VLAN 0 
• vxrail manager VM  change network IP  setting ,
• witness config checked.

thats validate error

vCenter server management username  i try use administrator@vsphere.local  or and follow the producture 

create vxrailconfig  and assign Role also.

and  i try ssh to vxrail manager vm  via mystc and ping / resolve the vcenter ip/FQDN  ok 

(i have modify the /etc/resolve.conf)

have any suggesting or reference  to verify / solve the error ? 

thanks.