Muse Sampler library not found on Manjaro Linux 24.2

Hello everyone,
I am trying to switch from Windows 10 to the latest Manjaro Linux release (24.2) and it's largely been a painless experience. But I am having some trouble with the Muse Sounds library. I installed MuseScore Studio 4.4 and it works fine; I then installed Muse Sounds Manager and downloaded the Muse Sounds library ther. However, MuseScore Studio seems unable to find the Muse Sounds. I think there's some problem with the Muse Sampler library which, as you can see, when I try to run the diagnostics, is shown as missing:

I then checked the diagnostics section where it tells me where MuseScore is searching for these files

but no matter how many times I reinstall MuseScore Studio or Muse Sounds Manager, there's nothing there.

Thanks in advance for any clarification!