[15:26:57] [Server thread/ERROR]: Could not pass event InventoryClickEvent to RaidAchievement v1.0
 org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:319) ~[forge:?]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[forge:?]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:593) ~[forge:?]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:578) ~[forge:?]
        at net.minecraft.network.play.ServerPlayNetHandler.func_147351_a(ServerPlayNetHandler.java:2269) ~[?:?]
        at net.minecraft.network.play.client.CClickWindowPacket.func_148833_a(CClickWindowPacket.java:34) ~[?:?]
        at net.minecraft.network.play.client.CClickWindowPacket.func_148833_a(CClickWindowPacket.java:12) ~[?:?]
        at net.minecraft.network.PacketThreadUtil.func_225383_a(PacketThreadUtil.java:22) ~[?:?]
        at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(SourceFile:144) ~[?:?]
        at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:886) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:169) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(SourceFile:118) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:869) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:863) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213161_c(SourceFile:127) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213202_o(MinecraftServer.java:849) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:781) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:265) ~[?:?]
        at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.NullPointerException