when i try to play anything on it the game crashes

When I go on a world or a server the*+ game crashes+. It takes me back to the loading page. I don't know if its just my computer or what. I've tried a lot of things like taking of my shaders and resource packs, loading on and of. This happened to me when I first got the game but then it stopped and I was able to play but now it has started again. Thank you if you are able to help.*