I have the same problem.
I’m developing a personal project on which I’m investing all my energy and I’ve decided to use metahuman and unreal 5 as a platform. One of the main reasons was the metahuman animator who currently seems to reach a great level of quality in facial mockup. But now I find myself with a non-working tool.
I worked on the study of the program and the platform and on its customization possibilities. everything went well BUT I can’t make the characters move their necks… please fix this problem, I’m desperate.