Audacity 3.1.3 not seeing audio from 828MKII

I recently upgraded my studio computer to a 2018 Mac Mini (3GHz 6 Core Intel Core i5) running OS Monterey 12.0.1. My interface is my old 828MKII, with a Firewire to USB-C adapter. Audio recording’s have been working fine with Digital Performer and Logic, but for some reason, Audacity 3.1.3 is not seeing any audio coming from the 828MKII, which is selected as the desired input & output.

Any ideas? Thanks in advance!