I am doing the exercises from CQ5 Students workbook and I will do exercise 5.3 (Extend the Foundation Page Content). It is not possible to add the property sling:resourceSuperType for me - I get this error text: "Keine passende Eigenschaftsdefinition gefunden" - means the property definition sling:... is not found.
What can I do in order to solve this issue.
Thanks a lot!!!