Have you solved this issue? I’ve just started trying to connect LLC+ to my HW Illumination 8 system and am having the same problem. I can ftp in to system using lutron and lutron as user/pw. I can also bring up a web keypad I created by going to the IP address of the processor.
Lutron keeps telling my I don’t need a userid and password when on my local network but app won’t allow the connection without one.
Very frustrating!