If I now create a text node, it shows up like:
Error: Font ‘’ not found
But I do have a font in the Font “gui scene folder” (not sure what to call it). It should probably default to the very first font in that folder, if the default font is missing from the project.
If I then assign the font, the label seems to disappear, so it might be a good idea to always have a default string already entered into the text field, like “Text” or so, to avoid confusion and to allow you to position it before specifying the text and/or font