gallery set up

hi there I’m having issues setting up image store plug in
I’ve installed & created a test gallery which all is ok then once i view the gallery its impossible to see the images they are tiny thumbnails in the far left side with text over the top stating this gallery contains no images

is there something I’m missing in the set up ??

https://wordpress.org/plugins/image-store/