momentLocalizer: Uncaught TypeError: Cannot call a class as a function

[ikreb7]

I get the error message: Uncaught TypeError: Cannot call a class as a function. This is my code:

import moment from "moment";
import momentLocalizer from "react-widgets-moment";

momentLocalizer(moment); ...

I get this error only with react-widgets and react-widgets-moments >=5.x. With react-widgets": "^4.2" and "widgets-moment": "^4.0.7" it works.