Leaderboard

Looks like the "Large Veins" mod is at fault. Have you tried removing / disabling it and launching the game again?

EntityPlayerMP#sendContainerToPlayer after every click you change the default behavior of.

Extend ContainerScreen instead. This will solve the E button problem. PlayerEntity#openContainer assuming your container is the one open on the client side. Show what you are doing now. They don't. The only reason to have a PacketBuffer parameter in your constructor is to pass extra data over from the server. I dont think yours needs that. I'm not at my IDE at the moment so I cant give you definitive answers with code, but I think I can point you in the proper direction, where to look, ect.

Your method is also static it needs to not be.