Racyfx

Hey, I had a problem with my modpack, I had made a server (the server is running), but if I try to join on the server it comes all the time the same crash-report. I tried too delete optifine, to reinstall the modpack and to reinstall the server, but nothing happens. The problem is already up and I need help because I don't know what I could do to fix the problem. Don't flame my english I tried to do my best. (I'm german) The Crash-Report: https://pastebin.com/Lhs8hAVC