Playback Controls Greyed Out, I/O Menu blank

• Nov 9, 2021 - 18:30

The beginning, play/pause, and loop buttons are greyed out. Pressing space doesn't do anything. I went to the I/O tab in preferences but all the drop downs are blank and gray, clicking on them does nothing. I also tried a factory reset, force quitting, and resetting audio and midi devices.
Thanks for any and all help.

Version Information:
OS: macOS 10.16, Arch.: x86_64, MuseScore version (64-bit):, revision: 3224f34

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