You should open a support ticket with UD.
I also ran in to a problem on my test Polisy, waited over 3 hours with nothing happening & Polisy unresponsive. Finally tried a reboot and my router shows Polisy is on line, but that is it. Can not get in with start.jnlp or ssh & portal shows it off line. The Polisy is dead.
Started a support ticket with UD and there is a method to recover, but you will need to get instructions from them. It requires an inexpensive hardware adapter, but since this is my test unit, I am not sure if I will proceed.