I'm struggling with a strange issue; when I try to show Sharepoint documents in an entity form, the error "No list could be found with the relative URL listUrl. Ensure that document management has been enabled for the entity." is shown. However; adding documents is possible! And within the Dynamics view, the Sharepoint document location is listed well with the right relative url.

I set up all by using the MS documentation (very precisely). And double (and triple) checked the entity permissions. 

Any thoughts or ideas?

Thanks a lot!