Hello.
It seems that Epic has forgotten to update Modular Rig in 5.6.
There seems to be a bug deep in the system that doesn’t allow you to create a proper foot controllers.
According to the Epic documentation, you should be able to drag&drop FOOT controller onto toe (ball) socket.
Unfortunately, this option has NEVER worked properly for me and thus i quickly dismissed animating in Unreal Engine (making Control Rig from scratch is a headache).
Here’s an Epic, UE4 mannequin in 5.6
Still unable to create proper Foot Controllers.
I should point out that, drag&drop has maybe 50% success rate whenever It will register or not.
Really disappointed that this hasn’t been fixed…
Edit: Even If you attempt to drag&drop Foot Controller to Foot, the socket instantly disappears as soon as you move the icon.