Textureproblem with Landscape sculping with nanite

Hi folks,

I’m completely new to UE and started to create a landscape with the sculping tools. I also created a material with layers explained in this tutorial: How to Create a Game in Unreal Engine 5 | Beginner Tutorial - RTS Game - YouTube
I activated nanite for my landscape and suddenly all my textures are gone. Can anybody help me with that?

Thanks in advance!

I just found out that nanite isn’t supported on landscapes currently. I’m using UE5.1 btw.