Freaky 2003

Hey Guys, I tried to install a Forge 1.7.10 Server on my Linux vserver (its NOT a dedicated game server). But every time somebody joins, it crash. I have made the server following this tutorial: https://www.youtube.com/watch?v=-9WEY1Dbtiw My 1.8.9 Server i´ve made before just worked fine. Used mods are: Security Craft, Advanced Lightsabers below ill post the crash report, and a video of the server starting (subtitles/comments are german, ´cause it was made for german forum). Video of Server starting (with some erros at the end): https://youtu.be/NvRvxP0lK_c (translation: "server läuft" = server is running; "ich (versuche zu) joinen" = i (try to) join) Crash Report: https://pastebin.com/KkDSrAYL