Playback window crashes the second I click on a clip

Hi! So Premiere has been working for me all day until a few hours ago. Now, whenever I select a clip, I can no longer see it in the viewfinder or press play. I have to restart the app to be able to watch it again, and then it'll happen again the second I click on a clip. I've rebooted the app multiple times, I don't have any funky plug-ins, and I'm running it on a 2020 macbook air. It just started all of a sudden. Does anyone know why this is happening / have an idea of how to fix it? Thanks so much!