[18:38:17 ERROR]: Could not pass event EntityDamageByEntityEvent to MMOLib v1.3.7.1
java.lang.IllegalArgumentException: Player must be online
        at org.apache.commons.lang.Validate.notNull(Validate.java:192) ~[patched_1.16.3.jar:git-Paper-220]
        at net.mmogroup.mmolib.api.player.MMOPlayerData.getPlayer(MMOPlayerData.java:79) ~[?:?]
        at net.mmogroup.mmolib.api.event.MMOPlayerDataEvent.<init>(MMOPlayerDataEvent.java:11) ~[?:?]
        at net.mmogroup.mmolib.api.event.PlayerAttackEvent.<init>(PlayerAttackEvent.java:29) ~[?:?]
        at net.mmogroup.mmolib.listener.event.PlayerAttackEventListener.a(PlayerAttackEventListener.java:47) ~[?:?]
        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor963.execute(Unknown Source) ~[?:?]
        at org.bukkit.plugin.EventExecutor.lambda$create$1(EventExecutor.java:69) ~[patched_1.16.3.jar:git-Paper-220]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80) ~[patched_1.16.3.jar:git-Paper-220]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[patched_1.16.3.jar:git-Paper-220]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:607) ~[patched_1.16.3.jar:git-Paper-220]
        at org.bukkit.craftbukkit.v1_16_R2.event.CraftEventFactory.callEvent(CraftEventFactory.java:252) ~[patched_1.16.3.jar:git-Paper-220]
        at org.bukkit.craftbukkit.v1_16_R2.event.CraftEventFactory.callEntityDamageEvent(CraftEventFactory.java:1042) ~[patched_1.16.3.jar:git-Paper-220]
        at org.bukkit.craftbukkit.v1_16_R2.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:929) ~[patched_1.16.3.jar:git-Paper-220]
        at org.bukkit.craftbukkit.v1_16_R2.event.CraftEventFactory.handleEntityDamageEvent(CraftEventFactory.java:885) ~[patched_1.16.3.jar:git-Paper-220]
        at org.bukkit.craftbukkit.v1_16_R2.event.CraftEventFactory.handleLivingEntityDamageEvent(CraftEventFactory.java:1074) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.EntityLiving.damageEntity0(EntityLiving.java:1825) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.EntityHuman.damageEntity0(EntityHuman.java:844) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.EntityLiving.damageEntity(EntityLiving.java:1160) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.EntityHuman.damageEntity(EntityHuman.java:761) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.EntityPlayer.damageEntity(EntityPlayer.java:838) ~[patched_1.16.3.jar:git-Paper-220]
        at org.bukkit.craftbukkit.v1_16_R2.entity.CraftLivingEntity.damage(CraftLivingEntity.java:337) ~[patched_1.16.3.jar:git-Paper-220]
        at net.mmogroup.mmolib.manager.DamageManager.damage(DamageManager.java:107) ~[?:?]
        at net.mmogroup.mmolib.manager.DamageManager.damage(DamageManager.java:72) ~[?:?]
        at net.mmogroup.mmolib.api.AttackResult.damage(AttackResult.java:134) ~[?:?]
        at net.Indyuce.mmoitems.ability.Item_Throw$1.run(Item_Throw.java:64) ~[?:?]
        at org.bukkit.craftbukkit.v1_16_R2.scheduler.CraftTask.run(CraftTask.java:99) ~[patched_1.16.3.jar:git-Paper-220]
        at org.bukkit.craftbukkit.v1_16_R2.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:468) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.MinecraftServer.b(MinecraftServer.java:1296) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.DedicatedServer.b(DedicatedServer.java:371) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.MinecraftServer.a(MinecraftServer.java:1211) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.MinecraftServer.w(MinecraftServer.java:999) ~[patched_1.16.3.jar:git-Paper-220]
        at net.minecraft.server.v1_16_R2.MinecraftServer.lambda$a$0(MinecraftServer.java:177) ~[patched_1.16.3.jar:git-Paper-220]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_261]