Unreal 'EuropeanHornBeam' package materials are all white

Hey guys

So I just added the European Hornbeam package, but to my utter dismay the leaves are all-white. The top side is completely white, while the bottom of the leaves are a bit greenish.

Bottom of leaves:

Top of leaves:

Does anyone know why it’s doing this and how I could go around to fix it?

I’m a newbie with Unreal Engine (only 2 weeks in), so any help would be appreciated a lot.

EDIT: So for some reason the material for the leaves looks white in my one project:
image

When I migrate a tree to another project I have, the leaves are green and the tree looks perfect:
image

I’m completely lost as to why this is happening:

Thank you for your time

Kind regards