Unity trees are coming out pink why?

When I import a package that has unity foliage or just trying to create a unity tree it always comes out pink in any of the unity 5 beta’s and b15 is no different. The tree creator shaders bark and leaves come out pink. Do they need to be unhidden or something. So my question is why can’t we use unity trees in unity 5 right now and does anyone else have this same problem? Thanks.

I’ve seen this with missing shader materials.

Anybody know how to fix this in b15 so the nature tree shaders dont show up pink?