Terrain is black

Hi all! I am a newbie when it comes to Unreal Engine. While I was working on my terrain Unreal crashed on me and when I reopened it all my texture has gone black. I tried rebuilding it but still not showing me the textures I painted. I had already set up my materials and painted the scene before it crashed. ( Also note that I saved before the crash ). Anyone knows what the issue would be?

Thanks!