3D FlipBook - UnknownErrorException: The API version 2.2.228 does not match the Worker version 2.9.359

I updated to Wordpress 5.9. Old Flipbooks work fine. New flipbooks show this error when opened in lightbox: UnknownErrorException: The API version "2.2.228" does not match the Worker version "2.9.359".

Strange, but lightbox activated from the bookshelf for the same flipbook works fine. Any ideas?