authenticated users cannot create or edit contents

Issue Summary

Admin and mods (self created role) can create and edit the wiki's content but authenticated users cannot, although I granted them

(access control)
- access content
- create wiki content
- edit own wiki content
- edit wiki content

(wikitools)
- Node Creation: Let users create new nodes when they type in a node name which does not exist.

Is there a different place to look at?

Thanks in advance