Why is the google map not loading on the site via js api?

Question

Google Maps

The site does not load the google map, the yandex map also does not load. No errors appear. On the local everything is OK, on ​​other sites too. API key received, domain verified
website: kiik.kz
code:

var googleMap;

      function initGoogleMap() {
        console.log('google map API ready');
        googleMap = new google.maps.Map(document.getElementById('map_block'), {
          center: {
            lat: -34.397,
            lng: 150.644
          },
          zoom: 8
        });
      }

<script src="https://maps.googleapis.com/maps/api/js?v=3&key=AIzaSyChBI7R9JqS2pLOfxDUTkpVaI_0n0exSmY&callback=initGoogleMap" type="text/javascript"></script>