I am currently using blender 2.8 and I was putting a texture on a plane, so it shouldn't have to be unwrapped, but it crashed and when I went to put it back on it just comes out as like an average color value of the image rather than the actual image. I have saved and quit, tried different images on new shaders. Nothing. In the screenshot showing image texture should be marble, but instead it's a bright white, it isn't a scaling or lighting problem.
Also worth noting that I'm using cycles to render.