No sound, though MuseSounds load (Linux)

I have had this problem for a long time now, and I’ve read all the posts I could find on this forum and others (Github). The problem is I lack the technical knowledge to fix it my self, or understand what to do.

The appimage version finds the Muse sounds I’ve downloaded with Muse sounds manager, but won’t play it. Just the blue line as described by so many (png attached). When I install from the app installer in my system it plays the basic soundfonts but can’t find the Muse sounds. My sound unit is “system default” (png attached). I have tried changing to different sound setups on my system, I have tried with my external sound card. Same result - blue line, no sound.

Basic info
Tuxedo OS KDE plasma 6.1.5
16 gig ram
MuseScore-Studio-4.4.2.242570931-x86_64.AppImage

When I read the diagnostics files I get a lot of errors I don’t know how to rectify.
The file gets really long so I’ll attach it, but here are some errors I believe to be significant:

Please be kind, and understanding of the fact that I lack knowledge in how to properly use terminal, code and such.

2024-10-25T11:36:47.532 | ERROR | main_thread | AudioModule::setupAudioDriver | audio output open failed
2024-10-25T13:02:25.936 | WARN | main_thread | Qt | QQmlComponent: Created graphical object was not placed in the graphics scene.
A lot of this:
2024-10-25T11:36:48.236 | ERROR | main_thread | GuiApp::perform | error: qrc:/qml/Muse/UiComponents/internal/PopupContent.qml:81:5: QML QQuickItem: Binding loop detected for property "implicitWidth"
A lot of this:
2024-10-25T11:41:06.676 | INFO | main_thread | ActionsDispatcher::dispatch | try call action: notation-move-right
2024-10-25T11:41:06.880 | ERROR | main_thread | UiActionsRegister::actionState | not found action with code: play-next-chord