Sound not working during playback

I’ve got a waveform, and my sound file is in MP3 format. It was working a few days ago and now I’m not getting any sound during playback or scrubbing. Thinking about running a clean reinstall of Quicktime. Suggestions?

You’ll need to provide more information.

O.S. version
Quicktime version

Also make sure not to have spaces or special characters in the folder path of the project, the folder
you’re importing sound from, the project name itself or folder path where the project is stored.
Only use a-z, 0-9, “_” and “-” to name things.