Do you know, if the Plugin "Accura FoodMenuWP" make conflict with Enfold theme?

Hi to all,
I use the “Accura FoodMenuWP” Plugin and after activating the plugin the gallery don’t work anymore.
The lightbox don’t work as well (if I click a picture, it don’t pop-up) and I have a gap between the pictures.
The developer from the “Accura FoodMenuWP” Plugin wrote that Enfold theme is the problem.
He suggest me to edit wp-content/themes/enfold/css/shortcodes.css

>>> shortcodes.css:2204:
>>> Remove:
>>> .av-masonry-col-6 .av-masonry-entry.av-landscape-img {
>>> width: 33.2%;
>>> }
>>> Add:
>>> .av-masonry-col-6 .av-masonry-entry.av-landscape-img {
>>> width: 100%;
>>> }

But it don’t works.
Do you have maybe a idea, is really the theme responsible?
Thank you in advance for any help.
Bye