I've discovered the cause of the issue and the add-on should be functional again as of version 2.0.3, which is being uploaded as I write this! After you update, your music playback should begin working just fine. Please do let me know if this fixes any issues that you've been having!
Thank you for the feedback!
EDIT: Version 2.0.3 is now available! Please do let me know if you continue to have issues.
