Land does not render

Maybe someone knows how to fix this.

I created a world composition with tiled landscape, created some textures on the land with some trees and ocean project as my ocean.
Player start is starting on the first tiled landscape, when i launch it (thru launch button) it compiles without any errors, but my char is falling through the land.
The project has ThridPerson as basis and is the persistent level.

It seems or the land is not rendered, or the char simply falls through.

What am i doing wrong?