The „Preview“ role is a specific role for partners who needs to access draft articles before publishing. You can find all users attached o this role in the administration
https://www.skoda-storyboard.com/wp/wp-admin/users.php?role=preview
After login in to redaction, user can access only posts in Draft from the website frontend. User must get from authoring team a url to post preview (post in draft). User is not able to list Drafts in authoring section!
URL should looks like: https://www.skoda-storyboard.com/en/?p=60218&preview=true with different ID