Musesounds not working with Flatpak version of Musescore 4.5 in Linux Ubuntu

Hello.

I installed Musescore Appimage in Linux and it will recognize Musesounds downloaded from the musesounds manager. But it will not play, the playback line is moving extremely slow, and there is no sound.

I then installed the flatpak version, and everything now works except it will not recognize Musesounds, only the basic sounds, Musesounds is grayed out and I cannot select it.

Any suggestions would be appreciated. thank you.