Connect more than three VE direct devices to a CERBO GX?

My Duppa came in and I plugged it in to the Cerbo and got a power light on the Duppa, but when I plug a couple of VE.Direct devices into it, they’re not showing up. I see another thread where someone said it stopped working at 3.50. I’m on 3.60~53 now. Is there a setting I’m supposed to change somewhere?