Why is my object black in rendered shading mode? I am quite new to using Blender, currently using the 2.8 Beta Version, and I decided to make a Low-Poly Island from a tutorial I found on YouTube

In the tutorial, he added a Light and changed it to the "Sun" setting, which I did. He changed the color of the light, made sure the Strength was all the way up (at 10), and turned Contact Shadows on. When he put it into rendering mode, it displayed a beautiful source of light that he was able to move around into the perfect angle, when I put it into rendering mode, and my model was all black, no light to be found.

I've tried everything I could, looking up tutorials on how to fix it, playing around with the settings, and after about 2 hours of attempting to get the lighting to work, I never got it. I've rewatched the video numerous times to make sure I followed everything step by step, and I could not find any possible errors or mistakes. I am doing this render as a project for my Digital Arts II class in High School.



http://pasteall.org/blend/index.php?id=51602
My best guess is that you are not actually in render mode. I just downloaded the exact file you linked, opened it, pressed z and went into render view, and the material was not entirely black, it showed up as below:



What process are you using to go into render mode? It works fine for me with your same file, so I would guess that you are in some other mode of displaying it.