Error while running event Todo-List::on_gui_click (ID 1)
Key "column_count" not found in property tree at ROOT
stack traceback: Todo-List/UI.lua:52: in function 'create_task_table' Todo-List/UI.lua:22: in function 'create_maximized_frame' Todo-List/todo.lua:34: in function 'maximize' Todo-List/todo.lua:171: in function 'on_gui_click' Todo-List/control.lua:16: in function <Todo-List/control.lua:15>