Hỏi đáp Xin giúp Fix lỗi QuantumRPG !

[11:03:38 ERROR]: Could not pass event ItemSpawnEvent to QuantumRPG v4.0.2-ALFA-B1
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:309) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:500) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:485) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at org.bukkit.craftbukkit.v1_13_R2.event.CraftEventFactory.callItemSpawnEvent(CraftEventFactory.java:469) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at org.bukkit.craftbukkit.v1_13_R2.event.CraftEventFactory.doEntityAddEventCalling(CraftEventFactory.java:380) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.World.addEntity(World.java:902) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.WorldServer.addEntity(WorldServer.java:917) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at org.bukkit.craftbukkit.v1_13_R2.CraftWorld.dropItem(CraftWorld.java:315) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at org.bukkit.craftbukkit.v1_13_R2.event.CraftEventFactory.callEntityDeathEvent(CraftEventFactory.java:575) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.EntityLiving.die(EntityLiving.java:1205) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.EntitySkeleton.die(EntitySkeleton.java:42) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.EntityLiving.damageEntity(EntityLiving.java:1055) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.EntityMonster.damageEntity(SourceFile:61) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.EntityHuman.attack(EntityHuman.java:1044) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.EntityPlayer.attack(EntityPlayer.java:1336) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.PlayerConnection.a(PlayerConnection.java:1855) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.PacketPlayInUseEntity.a(SourceFile:69) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.PacketPlayInUseEntity.a(SourceFile:13) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.PlayerConnectionUtils.a(SourceFile:10) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [?:1.8.0_201]
        at java.util.concurrent.FutureTask.run(Unknown Source) [?:1.8.0_201]
        at net.minecraft.server.v1_13_R2.SystemUtils.a(SourceFile:199) [spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.MinecraftServer.b(MinecraftServer.java:896) [spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.DedicatedServer.b(DedicatedServer.java:417) [spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.MinecraftServer.a(MinecraftServer.java:831) [spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at net.minecraft.server.v1_13_R2.MinecraftServer.run(MinecraftServer.java:729) [spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_201]
Caused by: java.lang.NoClassDefFoundError: Could not initialize class su.nightexpress.quantumrpg.libs.reflection.minecraft.DataWatcher$V1_9$ValueType
        at su.nightexpress.quantumrpg.libs.glowapi.GlowAPI.sendGlowPacket(GlowAPI.java:298) ~[?:?]
        at su.nightexpress.quantumrpg.libs.glowapi.GlowAPI.setGlowing(GlowAPI.java:120) ~[?:?]
        at su.nightexpress.quantumrpg.libs.glowapi.GlowAPI.setGlowing(GlowAPI.java:137) ~[?:?]
        at su.nightexpress.quantumrpg.libs.glowapi.GlowAPI.setGlowing(GlowAPI.java:175) ~[?:?]
        at su.nightexpress.quantumrpg.modules.itemhints.ItemHintsManager.setItemHint(ItemHintsManager.java:200) ~[?:?]
        at su.nightexpress.quantumrpg.modules.itemhints.ItemHintsManager.onItemSpawn(ItemHintsManager.java:126) ~[?:?]
        at sun.reflect.GeneratedMethodAccessor136.invoke(Unknown Source) ~[?:?]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_201]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_201]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:305) ~[spigot-1.13.2.jar:git-Spigot-f56e2e7-1a64d4a]
        ... 27 more