Do I just download the latest file and install client? That's what I did and every time I create a world it crashes with:
The game crashed whilst exception in server tick loop
Error: java.lang.NoClassDefFoundError: net/minecraft/world/ServerWorld
So I downloaded a mod and I put in my mods folder and then I start up Minecraft and this pops up. I don't know what to do. If anyone could help that would be great!
Picture: https://imgur.com/AXHpLsM