Grey Renders?!?

Hi Im pretty new to blender (been using for a couple of weeks). I’m trying to render an image atm but no matter what I do I can’t get it to render the actual scene instead its rendering a grey (there is lights). Just wondering if anyone could help



I can’t see it well, but could it be that the lights placed behind the object?
Ad a few cubes a bit further away to check if there is something wrong with the material ?

When I add a cube it appears in the render so must be a problem with the face right?