My modpack works fine (1.12.2) however when I add ice and fire to it, it crashes, when I remove ice and fire the modpack works fine. I don't know what parts of the crash report are necessary. All my mods are fully up to date. List of mods in my modpack - AI reducer ...
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:783) ~[?:?] {re:classloading,pl:accesstransformer:B} at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:80) ~[?:?] {re:classloading,pl:runtimedistcleaner:A} at net.minecraft.server....