No Audio When Playing Scores

Hello,

Recently I have encountered a playback problem with my scores on Musescore 3 for Linux (AppImage) (in use on a Chromebook). I have plugged in headphones and found that, while I can play audio on different audio-outputting sources (YouTube), nothing plays back in Musescore. The scroll bar scrolls through the score and everything, including the synthesizer, acts as if something is playing despite there not being anything playing. I have reset several settings to factory settings and unplugged and replugged in my headphones with no change. Is this a problem that others have faced and if so, what are some recommendations on how to fix it? (I have tried every available solution through the official Musescore article available on playback issues with no change.) Please help!