Thanks for contacting us and sorry for the troubles. Just need an underscore added in there on the fts instagram part, should be fts_instagram.
[fts_instagram instagram_id=1373108388 pics_count=8 super_gallery=yes image_size=240px icon_size=65px space_between_photos=5px hide_date_likes_comments=no center_container=no image_stack_animation=yes type=user popup=yes loadmore=button]
Here is a post we made about it with detailed instructions. http://www.slickremix.com/2015/12/26/underscore-required-in-shortcodes/
Spencer
Awesome, glad to hear that did it! If you get a second and feel like leaving a review for us, that would be awesome! https://ww.wp.xz.cn/support/view/plugin-reviews/feed-them-social
Thanks again for using our plugin and have a great night!
Spencer
