How can I see the textures on my project that I have made?

Hey everyone,

I have question about textures on a newly made project. Yesterday, I was creating some cubes for a mock up BPS brush assignment. When I tried opening my file today, the textures disappeared. Let me show you what I mean with pictures here.

What the original project looked like, the first picture is what the project looked originally and the second one is what my project looks like today: