Wow, you have a whole lot of mods installed. 1. Does he have the same mod pack and versions of mods as the server? 2. Does he have the same files in the minecraft/config folder as the server 3. Obviously, is he using the same version of forge
what version of java are you using? make sure you have the latest version of jdk for minecraft 1.11. if you have problems with switching versions or downloading java then ask away
minecraft got me started in learning javascript to program mods, and eventually inspired me to learn html and css for webpage developement. I'm only at elementry school so it didn't affect me that much yet
