Font dialog doesn't accept Cancel

• gnome-tweaks 46.beta
• Ubuntu 24.04 LTS

When I click one of the font dialogs in Fonts > Preferred Fonts, the Cancel button does not do anything.

I get this error on the command line:

$ gnome-tweaks 
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/gtweak/widgets.py", line 403, in _on_choose_font
    font_desc = font_dialog.choose_font_finish(result)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
gi.repository.GLib.GError: gtk-dialog-error-quark: Dismissed by user (2)