[17:43:19] [Server thread/WARN]: [QuestCreator] Task #280 for QuestCreator v5.2.0 generated an exception
java.lang.NoClassDefFoundError: org/apache/commons/lang3/Validate
	at com.comphenix.protocol.injector.netty.ChannelInjector.invokeSendPacket(ChannelInjector.java:651) ~[?:?]
	at com.comphenix.protocol.injector.netty.ChannelInjector.sendServerPacket(ChannelInjector.java:640) ~[?:?]
	at com.comphenix.protocol.injector.netty.ProtocolInjector$4.sendServerPacket(ProtocolInjector.java:403) ~[?:?]
	at com.comphenix.protocol.injector.PacketFilterManager.sendServerPacket(PacketFilterManager.java:786) ~[?:?]
	at com.comphenix.protocol.injector.PacketFilterManager.sendServerPacket(PacketFilterManager.java:740) ~[?:?]
	at com.guillaumevdn.gcore.lib.versioncompat.npc.NpcProtocols.sendPacket(NpcProtocols.java:82) ~[?:?]
	at com.guillaumevdn.gcore.lib.versioncompat.npc.NpcProtocols1_14.spawn(NpcProtocols1_14.java:206) ~[?:?]
	at com.guillaumevdn.gcore.lib.npc.Npc.spawn(Npc.java:140) ~[?:?]
	at com.guillaumevdn.gcore.lib.npc.NpcManager.addNpc(NpcManager.java:76) ~[?:?]
	at com.guillaumevdn.gcore.lib.npc.NpcManager.spawnNpc(NpcManager.java:152) ~[?:?]
	at com.guillaumevdn.questcreator.data.UserBoard$3.run(UserBoard.java:122) ~[?:?]
	at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftTask.run(CraftTask.java:81) ~[spigot.jar:git-Spigot-1eece4f-fe1199c]
	at org.bukkit.craftbukkit.v1_14_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:394) [spigot.jar:git-Spigot-1eece4f-fe1199c]
	at net.minecraft.server.v1_14_R1.MinecraftServer.b(MinecraftServer.java:1009) [spigot.jar:git-Spigot-1eece4f-fe1199c]
	at net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:396) [spigot.jar:git-Spigot-1eece4f-fe1199c]
	at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:957) [spigot.jar:git-Spigot-1eece4f-fe1199c]
	at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:802) [spigot.jar:git-Spigot-1eece4f-fe1199c]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151]
Caused by: java.lang.ClassNotFoundException: org.apache.commons.lang3.Validate
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[?:1.8.0_151]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:135) ~[spigot.jar:git-Spigot-1eece4f-fe1199c]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:81) ~[spigot.jar:git-Spigot-1eece4f-fe1199c]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_151]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_151]
	... 18 more