Problem with Gutenberg Editor

Hi there,

when I’m trying to share one of my newer Posts which are created with the Gutenberg Editor (Block Editor) I’m not able to do that.
Blog2Social doesn’t show me the Post text and won’t let me select another Picture (though there’s a gallery in the post) than the opener picture from the post – well… The image selection will open, but it’ll show just broken links/images.

all older posts that are created with the classic editor are working…

Is there anything I can do to solve this problem?

Greetings

The page I need help with: [log in to see the link]