No thumbnails or columns

Hi…have installed the plugin and created an API.

Unfortuantely this is how it looks on my site…

https://edgazette.co.uk/test-3/

There are no thumbnails and there is only 1 column.

This is the shortcode I used…
[Youtube_Channel_Gallery user=”AdobeSystems” key=”myownAPIkey” maxitems=”9″ thumb_columns_ld=”3″ title=”1″ description=”1″ description_words_number=”10″]

Have I done something wrong?

Many thanks,

Chris.

https://www.ads-software.com/plugins/youtube-channel-gallery/