problem compiling shaders

Hello Everybody I need Help :slight_smile:

i creat a landscape but i have a problem when i paint the landscape its always error and open compiling shader. i tried anything i also deleted data cash but its doesn’t work.
I have 6 Colors in this Landscape and i’m in the version ue 4.22 i send you a screen shot for understanding me betther.

and with the tesselation…
Impossible to work