MuseScore IS NOT compatible with VSL.
I have been talking with them since almost a year. They say they do not have the resources to write the code for VSL, it is not there priority !
If you know somebody that is willing to help them, he is welcome !
MacBook Pro M3 MAX 128 GB 8TB - 2 x 48" - 1 x 27" screen --- Logic Pro --- Mir Pro 3D Dolby Atmos --- Most of the VI libs, a few Synch... libs --- Quite a few Kontakt libs --- CS80 fanatic