When i try to open the mod window i get this.

Error while running event Todo-List-Continued::on_gui_click (ID 1)
Todo-List-Continued/todo/features/export_task.lua:6: attempt to index global 'global' (a nil value)
stack traceback:
Todo-List-Continued/todo/features/export_task.lua:6: in function 'update_export_dialog_button_state'
Todo-List-Continued/todo/ui/main_frame.lua:57: in function 'create_maximized_frame'
Todo-List-Continued/todo/features/main_ui.lua:69: in function 'maximize_main_frame'
Todo-List-Continued/todo/features/main_ui.lua:58: in function 'on_maximize_button_click'
Todo-List-Continued/todo/todo.lua:94: in function 'on_gui_click'
Todo-List-Continued/control.lua:20: in function <Todo-List-Continued/control.lua:19>