Cubase 10.5 Playback Dropouts

Hello. I see that this issue was posted before but I haven’t seen a solution. I purchased 10.5 last year but just upgraded to it only because I was recently able to get a new Mac (running Catalina). During playback however, I’ve been getting dropouts every 5 seconds. I tried to go back to Cubase 10 and have the same issue. Even when I’m not playing tracks and just playing a virtual instrument (piano), it drops out as well. Please help!

My setup:
MacPro (Catalina)
Uad Apollo Quad