Hi Mats, Reading Stan’s experience, and assuming that you are using Frescobaldi, I am wondering: might it be possible that somehow the file permissions for LilyPond didn’t get updated properly? I might try to remove LilyPond 24.4 from the list of “LilyPond versions to use” in the Preferences menu, then download LilyPond anew from “+ Add…” -> 2.24.4 (latest stable).
Apologies if that doesn’t help you; I myself have been avoiding to upgrade my OS because I have some old Finale files that I would benefit from having access to… Yoshi
