Today I tried to play some Minecraft, but the game was being super tacky and the F3 menu showed 0 FPS. The game worked perfectly earlier today (5/19/2020). I don't recall doing anything else than playing the game normally. Also I'm playing on 1.15.2 with Optifine. Everytime I have to close the game via Task Manager, and every time I do that, the Minecraft Launcher opens and it says that the game crashed. And it doesn't even say "Minecraft" in the Task Manager, but thats probably because of Optifine.