Gallery ID's lost after update

Hi,

I’m using the latest version of WP and also just did the update to the latest version of NG.
My theme is GRIDICULOUS.
Everything worked fine for about a year now. But something went wrong during the update, I guess. When I manage the galleries all PAGE ID’s show 0.
The albums are displayed correctly as always. But the pictures in the single albums don’t show up.

I guess there’s something wrong with the links. And would be thankful for any idea how to solve this issue.

I even created a new album, but the picture in the new album doesn’t show up as well.

Thx for your support!!!