Masonry gallery will not work

Hi, I cannot get the masonry gallery to work, even though its selected.

I am using customizr theme and this is the page.

http://www.algarvetriathlons.com/?page_id=720

Spent ages looking..please help….I have also ticked off Crop thumbnail to exact dimensions (normally thumbnails are proportional)

Many thanks

https://wordpress.org/plugins/simple-photo-gallery/