ui button material are unvisible in the "game" window but visible in "scene window"

i created material to textureing my button with image but the proplem is material are unvisible in the “game” window but visible in “scene window”

so what’s the wrong ?
check my screenshot in attach files

Is your chessboard a canvas?

What are the settings on your canvases? If they are both screen space - Camera. Try changing your second canvas to have order in layer to 1 if your other canvas is 0.

i fixed the proplem it was in image setting