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java.lang.NoClassDefFoundError: kq at net.minecraftforge.fml.common.event.FMLModIdMappingEvent.<init>(FMLModIdMappingEvent.java:73) at net.minecraftforge.fml.common.Loader.fireRemapEvent(Loader.java:1064) at net.minecraftforge.fml.common.registry.PersistentRegistryManager.injectSnapshot(PersistentRegistryManager.java:360) at net.minecraftforge.fml.common.FMLContainer.readData(FMLContainer.java:329) at net.minecraftforge.fml.common.FMLCommonHandler.handleWorldDataLoad(FMLCommonHandler.java:421) at net.minecraft.world.storage.SaveFormatOld.loadAndFix(SaveFormatOld.java:119) at net.minecraft.world.storage.SaveHandler.func_75757_d(SaveHandler.java:122) at net.minecraft.server.integrated.IntegratedServer.func_71247_a(IntegratedServer.java:76) at net.minecraft.server.integrated.IntegratedServer.func_71197_b(IntegratedServer.java:197) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:442) at java.lang.Thread.run(Unknown Source)