Why is the 2GIS map not loading?

Question

JavaScript

I connect the card exactly according to the API 2gis instructions. But it is displayed in gray, that is, the map elements are not loaded. Why and how to fix?
In the head section

<script src="https://maps.api.2gis.ru/2.0/loader.js?pkg=full"></script>
    <script type="text/javascript">
      var map;
        DG.then(function () {
            map = DG.map('map', {
                center: [55.016595, 82.948391],
                zoom: 16,
                // zoomControl: false,
                minZoom: 11,
                fullscreenControl: false,
                scrollWheelZoom: false
            });
    </script>

in bodysuit

<div class="map-wrapper">
    <div id="map" style="width:100%; height:100%"></div>
  </div>

Answer 1

The problem was the following, the styles for img interfered.

img {
  max-width: 100%;
  max-height: 100%;
}