Gallery No Longer Responsive

Hi, Photoblocks is a great plugin, however, since the last update the galleries stopped being responsive on mobile devices/smartphones. Instead of stacking the images on the smaller screen, the entire gallery is shrunk to fit the screen.

This is happening on every page with a gallery photoblock https://www.faydesigns.ie/fay-designs-blog/

Also, since the update a new field “Mobile Layout” has appeared. Underneath is a button “Add Layout” but when I click on this nothing happens.

Hopefully you can help.

Thank you, Geraldinbe Fay

The page I need help with: [log in to see the link]