Thanks @darthviper107 foir your reply.
The confusing thing is that when using the content browser import button, the fbx gets recognised as skeletal mesh.
“…] object is not set up in a way that the scene import option recognizes it as a skeletal mesh.”
Any idea what things need to be considered to assure that? I couldnt find any specific information, e.g. re scene hierarchy or naming.
Many thanks once again.