Metahuman eye look at player problems

Hello there - I’ve been following this tutorial (how to make a MetaHuman character look at the player. https://www.youtube.com/watch?v=Xg1s8bliOUs), but unfortunately the same logic does not seem to work with new Metahuman characters. Even creating a new MHC in the same project provided by the tutorial and copying over all the logic, variables etc, doesn’t seem to work. I would really like to use the logic implimented here, because it does work brilliantly in the download example, but I’ve been struggling to get it working with new characters for a week. The blinking and smiling works, but the eyes are always looking down. Does anyone have any advice about getting this working?