All pictures in one line not in grid/mosaic/tiles

Hi!

I use Flickr API e.g. with: [flickrapi user=”kambor-wiesenberg” get=”photoset” id=”72157639059918783″ size=”s” count=”50″] but the pictures are all in a vertical line not a grid/mosaic/tiles. (see: https://www.kambor-wiesenberg.de/objekte-installation/nur-zu-ihrer-sicherheit/ ). What’s wrong?

Thanks for your help

regards
Stephan

https://www.ads-software.com/plugins/flickr-api/