mobs dont drop any loot. on death i have messages:
[15:39:52 ERROR]: Could not pass event EntityDeathEvent to MythicMobs v4.10.1-3456 java.lang.NullPointerException: null at net.Indyuce.mmoitems.MMOItems.getMMOItem(MMOItems.java:514) ~[?:?] at net.Indyuce.mmoitems.MMOItems.getItem(MMOItems.java:518) ~[?:?] at net.Indyuce.mmoitems.api.droptable.item.MMOItemDropItem.getItem(MMOItemDropItem.java:53) ~[?:?] at io.lumine.xikage.mythicmobs.compatibility.MMOItemsSupport$MMOItemsDrop.get(MMOItemsSupport.java:98) ~[?:?] at io.lumine.xikage.mythicmobs.drops.LootBag.add(LootBag.java:70) ~[?:?] at io.lumine.xikage.mythicmobs.drops.DropTable.handleDrop(DropTable.java:209) ~[?:?] at io.lumine.xikage.mythicmobs.drops.DropTable.generate(DropTable.java:191) ~[?:?] at io.lumine.xikage.mythicmobs.adapters.bukkit.BukkitSkillTriggers.onDeathTrigger(BukkitSkillTriggers.java:420) ~[?:?] at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor841.execute(Unknown Source) ~[?:?] at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.16.2.jar:git-Paper-141] at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.16.2.jar:git-Paper-141] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.16.2.jar:git-Paper-141] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.16.2.jar:git-Paper-141] at org.bukkit.craftbukkit.v1_16_R2.event.CraftEventFactory.callEntityDeathEvent(CraftEventFactory.java:798) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.EntityLiving.d(EntityLiving.java:1490) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.EntityLiving.die(EntityLiving.java:1419) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.EntityLiving.damageEntity(EntityLiving.java:1261) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.EntityMonster.damageEntity(EntityMonster.java:52) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.EntityZombie.damageEntity(EntityZombie.java:250) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.EntityArrow.a(EntityArrow.java:333) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.IProjectile.a(IProjectile.java:125) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.EntityArrow.tick(EntityArrow.java:176) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.EntityTippedArrow.tick(EntityTippedArrow.java:92) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.WorldServer.entityJoinedWorld(WorldServer.java:834) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.World.a(World.java:892) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.WorldServer.doTick(WorldServer.java:526) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.MinecraftServer.b(MinecraftServer.java:1358) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.DedicatedServer.b(DedicatedServer.java:375) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.MinecraftServer.a(MinecraftServer.java:1211) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.MinecraftServer.w(MinecraftServer.java:999) ~[patched_1.16.2.jar:git-Paper-141] at net.minecraft.server.v1_16_R2.MinecraftServer.lambda$a$0(MinecraftServer.java:177) ~[patched_1.16.2.jar:git-Paper-141] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_231]