How to fix Yandex maps?

Question

JavaScript

The code:

<script src="//api-maps.yandex.ru/2.1/?lang=ru_RU" type="text/javascript"></script>

ymaps.ready(function () {
       var myMap = new ymaps.Map("ymap", {
            center: [56.489291, 84.968917],
            zoom: 17
        }),
            myPlacemark = new ymaps.Placemark([56.489291, 84.968917], {
          balloonContentHeader: "",
          balloonContentBody: ""
          
        });
        myMap.geoObjects.add(myPlacemark);
        myMap.behaviors.enable('scrollZoom');
    });

Answer 1

Normally it works:
Add:
And we get: