[17:54:41] [Server thread/ERROR]: Could not pass event StructureGrowEvent to QuestCreator v5.12.0
org.bukkit.event.EventException: null
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:320) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:529) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:514) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.BlockSapling.tick(BlockSapling.java:51) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.Block.c(Block.java:355) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.IBlockData.b(SourceFile:269) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.WorldServer.a(WorldServer.java:439) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.ChunkProviderServer.lambda$9(ChunkProviderServer.java:422) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at org.bukkit.craftbukkit.libs.it.unimi.dsi.fastutil.longs.Long2ObjectLinkedOpenHashMap$1.forEach(Long2ObjectLinkedOpenHashMap.java:1661) [spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at com.google.common.collect.Iterables$UnmodifiableIterable.forEach(Iterables.java:105) [spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.ChunkProviderServer.tickChunks(ChunkProviderServer.java:364) [spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.ChunkProviderServer.tick(ChunkProviderServer.java:334) [spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.WorldServer.doTick(WorldServer.java:259) [spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.MinecraftServer.b(MinecraftServer.java:1067) [spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.DedicatedServer.b(DedicatedServer.java:406) [spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.MinecraftServer.a(MinecraftServer.java:969) [spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:814) [spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_72]
Caused by: java.lang.IllegalArgumentException: player can't be null
	at com.guillaumevdn.questcreator.module.quest.QuestManager.progressAttemptPlayerEvent(QuestManager.java:181) ~[?:?]
	at com.guillaumevdn.questcreator.listeners.BlockEvents.event(BlockEvents.java:15) ~[?:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_72]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_72]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_72]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_72]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:316) ~[spigot-1.14.4.jar:git-Spigot-1981d55-da62a66]
	... 18 more