cursor.add(text) crashes for Element.FINGERING

I ran into the same issue and had to make a few changes to the MuseScore code that can be found here: https://github.com/musescore/MuseScore/pull/5397. If this gets approved, you will be able to do "cursor.add(Element.FINGERING, noteElement)".

> I wanted to use fingering-style annotations of notes because it's closest to the look I need.

If you want to use a fingering only for its visual style and not for its other features then you may want to just assign a text style of the added text element to Tid.FINGERING:

var text = newElement(Element.STAFF_TEXT);
text.subStyle = Tid.FINGERING;
text.text = "1";
cursor.add(text);