Forum Application: Can not see answers

Hi together,
I installed the Forum Application (version 2.2.1) on my XWiki instance, but for some reason I cannot see the answers posted. The page tree to the left shows child pages under the topic, but the topic itself doesn’t have any answers registered and also doesn’t show them, when opening the topic.
One thing I’ve tried already is changing the editing rights of user groups to the forum and its child pages, but this didn’t help