PrettyKoolKat

I've been trying to find a solution and all the posts regarding the topic were all made 3-4 years ago and haven't been of any help. Everytime I press "play" on a modpack, the launcher will close as it's supposed to, but then almost immediately just re-opens. I don't think it's a problem with the RAM because I've tried every RAM option and it still doesn't work, I've updated all my drivers and it's still going on. Anyone got any ideas as to why this is happening?