Google Maps | Map only shows on my computer, no-one elses

Question

I have reached exhaustion on a bug with my Google map.

The map populates fine on my version of Chrome, but doesn't on anyone else's or any other browsers.

It doesn't produce any indications of a struggle in the console. The codes imply doesn't populate the div with an id=map.

I will attach some screenshots of the results, my code, and the console.

• I have used my own API key, where it is expressed in the code...

The code:

<div id="map"></div>
<script>
    var map;
    function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
            center: {lat: 43.627489, lng: -79.662732},
            zoom: 11
        });

        var request = {
            placeId: 'ChIJ-2h986dAK4gRlDAADdqtUDo',
            fields: ['name', 'formatted_address', 'place_id', 'geometry']
        };

        var infowindow = new google.maps.InfoWindow();
        var service = new google.maps.places.PlacesService(map);

        service.getDetails(request, function(place, status) {
            if (status === google.maps.places.PlacesServiceStatus.OK) {
                var marker = new google.maps.Marker({
                    map: map,
                    position: place.geometry.location
                });
                google.maps.event.addListener(marker, 'click', function() {
                    infowindow.setContent('<div><strong>' + place.name + '</strong><br>' + place.formatted_address + '</div>');
                    infowindow.open(map, this);
                });
            }
        });
    }
</script>
<script async defer src="https://maps.googleapis.com/maps/api/js?key=KEYGOESHERE&libraries=places&callback=initMap"></script>

The consoles:

The results:

Working...

Not working...

Please help me discover why this is only working on very specific versions of Chrome and none of the others.