Control rig option missing?

Hi there. I have a question linked to an experimental feature. I’m using UE 4.16.3 and after having turned on the experimental control rig plugin, I can’t find the control rig option in the context menu under create Advanced Asset > Animation. I only have the possibility of creating a control rig sequence. I tried reactivating the plugin and restarting the editor but to no avail. I saw many videos where this control rig option was available, but more for recent versions of UE4. I have no idea when this plugin was released. Is it a normal behavior for this specific version of UE4 or is this some kind of bug? Thanks