When I start up the game, I cant click any button in the main menu. Reinstalling or repairing the game seems to fix this glitch briefly, but it returns. This glitch happens in 1.12.2, 1.11. 1.8.8 and possibly other versions too. Strangely, if I run the latest version of forge, this glitch does not occur. The only mod I have installed is Optifine, and I have verified that it is not the cause of the problem. I may be wrong, though.