[12:04:41 ERROR]: Could not pass event CreatureSpawnEvent to InfernalMobs v4.8
org.bukkit.event.EventException
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at org.bukkit.craftbukkit.v1_9_R2.event.CraftEventFactory.callCreatureSpawnEvent(CraftEventFactory.java:280) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at net.minecraft.server.v1_9_R2.World.addEntity(World.java:973) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at net.minecraft.server.v1_9_R2.SpawnerCreature.a(SpawnerCreature.java:186) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at net.minecraft.server.v1_9_R2.WorldServer.doTick(WorldServer.java:227) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at net.minecraft.server.v1_9_R2.MinecraftServer.D(MinecraftServer.java:781) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at net.minecraft.server.v1_9_R2.DedicatedServer.D(DedicatedServer.java:399) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at net.minecraft.server.v1_9_R2.MinecraftServer.C(MinecraftServer.java:665) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at net.minecraft.server.v1_9_R2.MinecraftServer.run(MinecraftServer.java:564) [spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_66]
Caused by: java.lang.NullPointerException
        at io.hotmail.com.jacob_vejvoda.infernal_mobs.EventListener.onMobSpawn(EventListener.java:218) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor36.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_66]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_66]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-1.9.4.jar:git-Spigot-8a048fe-a022dd2]
        ... 12 more