I can't type ü (ö, or ä) anymore

Before the error happened, I was editing a note and trying to type the letter “ü” by pressing ‘option + u’
I can’t type ü (ö, or ä) anymore

Error message (don't change this)
Anki 24.04.1 (ccd9ca1a)  (ao)
Python 3.9.18 Qt 6.6.2 PyQt 6.6.1
Platform: macOS-11.7.6-x86_64-i386-64bit

Traceback (most recent call last):

  File "aqt.webview", line 628, in handler

  File "aqt.editor", line 634, in <lambda>

  File "/Users/ameliewertheim/Library/Application Support/Anki2/addons21/1322529746/gui/editor.py", line 64, in _on_suggestion_button_press

  File "/Users/ameliewertheim/Library/Application Support/Anki2/addons21/1322529746/gui/editor.py", line 82, in _on_suggestion_button_press_inner
    open_suggestion_dialog_for_single_suggestion(editor.note, parent=editor.widget)

  File "/Users/ameliewertheim/Library/Application Support/Anki2/addons21/1322529746/gui/suggestion_dialog.py", line 101, in open_suggestion_dialog_for_single_suggestion
    ah_did = _determine_ah_did_for_nids_to_be_suggested([note.id], parent)

  File "/Users/ameliewertheim/Library/Application Support/Anki2/addons21/1322529746/gui/suggestion_dialog.py", line 327, in _determine_ah_did_for_nids_to_be_suggested
    dids_that_all_notes_could_belong_to = set.intersection(

TypeError: descriptor 'intersection' for 'set' objects doesn't apply to a 'NoneType' object

Sentry link (for developers)

You can work around this by changing the “Create suggestion for note” hotkey in the add-on’s config.