无法显示KML文件中的自定义图标

My KML file:

我的KML文件:

    <?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="https://www.opengis.net/kml/2.2">
<Document>
<Style id="cafeIcon">
    <IconStyle>
        <Icon>
            <href>https://beta-gmapsapi.esy.es/images/markers/cafe.png</href>
        </Icon>
    </IconStyle>
</Style>
<Placemark>
    <name>Test marker</name>
    <description>Description for test marker</description>
    <styleUrl>#cafeIcon</styleUrl>
    <Point>
        <coordinates>30.46633243560791,50.44826825956681,0</coordinates>
    </Point>
</Placemark>
</Document>
</kml>
    <?xml version="1.