I just went through all the tutorial videos and everything was working perfectly. I would hover over a button, it would display a hover state, and I could click it. I closed the project and opened my main project, did the exact same setup, and now the buttons (sprites) no longer do anything. I made sure they have box colliders, I went through the tutorial videos again and did everything the exact same way, but the buttons do not work. What's going on here? Anyone else having this problem?