[Theme: Flat] & Carousel-Gallery (Jetpack)

I Installed the ‘Flat’ theme since a long time (3 months…) with Jetpack for the gallery function ‘carousel’

Since i published a new foto-report I miss my carousel-function. I only can choose link to media-file or to media-site… ??

What can I do??
I think it’s a Problem with a (theme-)update??!? I always update the Plugins & the WP installation