Maybe @Damien3 will respond to you here… in between here is an answer he gave to users having problems with their preferences… differente from mine, but maybe them will work?!?
Pouvez-vous entrer les deux commandes suivantes dans l’application Terminal:
in english it means, can you enter those two commands in terminal (seperately)
copy first line, paste in terminal, hit enter, do the same with second one… restart mac just to be sure and try again adding a folder to sync… don’t have any idea
defaults delete com.audirvana.Audirvana-Plus
defaults delete com.audirvana.Audirvana