I'm up and running with polisy but I have to say it took some fiddling. Here's what worked for me in case it's helpful. First the device booted up as expected with the proper sequence according to the directions. My router assigned an address and identified the device as polisy. I cleared my java cache and then tried to connect with https://polisy. This did not work on Edge, IE, or Chrome. Tried the DCHP address. No joy on Edge or IE. On chrome, the device refused connection. I noticed that my ISY was on 5.015 and downloaded and installed 5.016B. Reset the polisy. Same result. Reset it again...and tried the browsers. Was about to give up when Chrome finally worked but with the expected warning. I was able to login, set the password etc. and install nodeservers. Appeared to be working fine. Established a static address for it in my router. Made it a 'favorite' on Chrome. Logged out and was able to log back in successfully even after rebooting the PC. Still couldn't get it to come up Edge, IE. It doesn't show up as a device on the network (I have only one) but Windows 10 is screwy about this. The ISY shows up sometimes and sometimes not. Tried Windows button +R with the static address...bingo it comes up in Edge.
I'm happy its working but will have to leave it to others to explain the behavior.
UDI is a great company and I'm happy to support them...always responsive and the ISY is an extraordinarily useful, stable device that I've had for years.