I'm making my own theme and I just got this message while trying to activate my theme: "The active theme is broken. Reverting to the default theme." Live preview works, but when I select this theme it reverts back to a new theme. I have index.php and my style.css files set up as I was using this theme fine before. I've disabled all plugins and even tried a fresh copy of wordpress.
Is there any way to troubleshoot this issue and see what in my theme is breaking?