this is the issue I have had since beginning of December.
It has been Escalated all the way up to the head of VDP engineering and they are stumped.
They have now pushed it back to Vmware as they are sayign its an SSO error.
Strange as we have Vshield, View, Update Manager and View Composer all plugged into SSo and they all work fine.
interestignly in that article you posted it mentions SSL. We have put in internal SSL Certs accross the estate and VDP is the only thing we cant put our SSL into and tell it to accept our Cert Server.
I suggest you log a call with Support to highlight the issue so they can put more resource into fixing it.