Here are some steps you can try to troubleshoot your PowerPoint presentation:

1. Verify that the music file you are attempting to use is compatible with PowerPoint
2. Check if the music file is corrupted and if it is try replacing it with a different file
3. Make sure that the music isn’t too large to work in PowerPoint, if so, try reducing the size
4. Check if the problem is with the slide itself by testing the music on another slide
5. Finally if the file is indeed compatible, try resetting the multimedia settings in PowerPoint