The certificate type 'BACnet-Command' Not registered

Ok I've never run NR on windows so can't help.
Have you tired reading Present Value of Analog 1 ?
BTW I've haven't been able to read Multi state from device
AI/AO/AV/DI/DO/DV

I don't use the BACnet node I use the underlying library via a function node
Have look at my response on this thread