Animations not showing up in Persona?

So this is a weird one… on my end everything works as advertised. However a colleague is cloning the project via Perforce and on his end, for our main character, even though the animBP and everything is fully functional, not a single animation (out of hundreds) isn’t showing up in the Animations tab in Persona. He can still access all of the animations by double clicking them in the content browser which is fine, so it ends up being a minor annoyance.

However, it becomes extremely serious when you take into account that this issue persists across all animation pickers, e.g. if he were to place the mesh inside the level and wants to assign an animation to it, he can’t. Most importantly however, he can’t play animations in Matinee.

Has anyone had this happen to them? Did you fix it? If yes, how?