invalid_artist setting

[weilah]

hi there,

could someone please help me setting up correctly the invalid artist property in settings.ini?

I'm having troubles defining more than one artist with spaces and spacial chars in the name (like ä/ü/ö). I started with invalid_artists = {'Name Surname', 'Näme Surname', 'Name Sürname'} but I get a 500 Internal Server Error with every combination I try.

I can provide more logs if needed.
Thanks!