java.lang.IllegalAccessError: tried to access field net.minecraft.stats.Achievement.field75996_k from class chikachi.discord.config.message.AchievementMessageConfig
    at chikachi.discord.config.message.AchievementMessageConfig.handleEvent(AchievementMessageConfig.java:37)
    at chikachi.discord.listener.MinecraftListener.onPlayerAchievement(MinecraftListener.java:80)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_141_MinecraftListener_onPlayerAchievement_AchievementEvent.invoke(.dynamic)
    at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:49)
    at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:140)
    at net.minecraft.entity.player.EntityPlayerMP.func_71064_a(EntityPlayerMP.java:852)
    at net.minecraft.entity.player.EntityPlayer.func_71029_a(EntityPlayer.java:1647)
    at blusunrize.immersiveengineering.common.entities.EntityRevolvershot.onImpact(EntityRevolvershot.java:296)
    at blusunrize.immersiveengineering.common.entities.EntityRevolvershot.func_70071_h(EntityRevolvershot.java:211)
    at net.minecraft.world.World.func_72866_a(World.java:1862)
    at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:700)
    at net.minecraft.world.World.func_72870_g(World.java:1831)
    at net.minecraft.world.World.func_72939_s(World.java:1663)
    at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:545)
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:701)
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:344)
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:605)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:481)
    at java.lang.Thread.run(Thread.java:745)