H4N Not Recognized by Mac computer

When I first connected my Zoom H4N Pro via USB it was recognized by my computer and I could choose it as an input. I was prepping at night to use it in the morning. I then disconnected things for the night. The next morning I tried to set it up and it wasn't recognized. I thought maybe it had to do with needing to update my computer from whatever it was before to Catalina, so I did. Still isn't working. The H4N goes through the whole "connect" protocol but the computer just doesn't recognize it. My Mac is a newer one, with just the two ports USB-C on the side so I use a USB converter dongle. But why would it work once and then never again?

Thanks for your help.