super expression must either be null or a function at Object._inherits

when i try to import a class( with super initialize) in to another class, i get this error

super expression must either be null or a function Object._inherits

and my code doesnt work,
below is imported class

export default class ToDo extends Editor{
#toDoEditor = null;
initialize(id, settings): void
{
    super.initialize(id, settings);
    this.#createEditor();
}}

Any hints at all as to what is wrong would be appreciated.