How to make texture animate with mass spoawner?

Hello, I have vertex animated texture , when I place a mesh alone using that texture, it is animated (vertex animation) however when I use the mass spawner, the vertexes are not animating anymore, heck, the materials are not even rendering when I add crowd representation… I get the default pose manequin with the default grid material (lack of material default grid), does anyone knows how can I make the mass entity trait data asset accept the material?

If I create an actor, set that mesh as the root and use that inthe mass spawner it works but not if i just get the mesh