[FIXED] Landscape doesn't display texture properly (8k texture free to use for anyone included)

Hey,

This is a probably something easy to solve but I can’t find where I messed up.
So I have got this landscape I created in World Machine, and I would like to work with it in UE.
I generated the landscape via the heightmap, and created a material with the colorlmap as the BaseColor.
But as you can see in this screenshot the whole landscape has a uniform color.

What did I do wrong ?

Here are the heightmap and colormap I’m using (8k maps free to use for anyone) : Zippyshare.com -