new graph
click File: Export Graph to open expG2img dialog
make sure dialog theme is <last used>, then close the dialog without exporting. If there is no last used theme, click OK to export
click File: Export Graph: Open dialog
click the triangle button of dialog theme, select system default
click OK
==> error message: Variable value is not in predefined list, VarName = dk, VarValue = -1
Fixed in Origin2024b.