IOS App show “comming soon”

Hey there,
just installed the gmedia gallery pro plugin and created some categories, gallerys, albums with the uploaded images to the gmedia library.
I also installed on my iphone 8+ the ios app and activate the needed cloud service.
Everything seems ok so far, but …
The app show nothing, no category, no gallery, no album, no images.
I am the administrator of the site and i am able to find my site in the app and also to log in with my adminstrator credentials. -> But nothing is shown. It only shows my listed Website with the comment “Comming Soon”.
What did i miss?

Thanks in advance, a little help would be great.
Thank you

Jürgen