Saturnpenny

Hello! I need some help figuring out a crash report, I'm running minecraft forge 1.12 w/ mods. The full crash message was "The game crashed whilst exception ticking world Error: java.lang.IllegalArgumentException: bound must be positive", the game would crash almost seconds after my bf joined our LAN server, and would receive the same crash message. All the fixes I found online seemed specific to the players' modset, so here is a pastebin link to my full crash report - please let me know if you need any other information!