[09:59:19] [Craft Scheduler Thread - 226/WARN]: Exception in thread "Craft Scheduler Thread - 226"
[09:59:19] [Craft Scheduler Thread - 226/WARN]: org.apache.commons.lang.UnhandledException: Plugin InstaWall v4.3.1 generated an exception while executing task 169732
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: Asynchronous entity world add!
	at org.spigotmc.AsyncCatcher.catchOp(AsyncCatcher.java:14)
	at net.minecraft.server.v1_8_R3.World.b(World.java:2732)
	at net.minecraft.server.v1_8_R3.Chunk.addEntities(Chunk.java:904)
	at org.bukkit.craftbukkit.v1_8_R3.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:49)
	at org.bukkit.craftbukkit.v1_8_R3.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:1)
	at org.bukkit.craftbukkit.v1_8_R3.util.AsynchronousExecutor.skipQueue(AsynchronousExecutor.java:337)
	at org.bukkit.craftbukkit.v1_8_R3.util.AsynchronousExecutor.getSkipQueue(AsynchronousExecutor.java:295)
	at org.bukkit.craftbukkit.v1_8_R3.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:16)
	at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:132)
	at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:114)
	at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.getChunkAt(CraftWorld.java:144)
	at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.getBlockAt(CraftWorld.java:90)
	at org.bukkit.craftbukkit.v1_8_R3.block.CraftBlock.getRelative(CraftBlock.java:179)
	at org.bukkit.craftbukkit.v1_8_R3.block.CraftBlock.getRelative(CraftBlock.java:187)
	at org.bukkit.craftbukkit.v1_8_R3.block.CraftBlock.getRelative(CraftBlock.java:183)
	at com.vk2gpz.instawall.b$c.run(b$c.java:5)
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:59)
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
	... 3 more

[09:59:19] [Craft Scheduler Thread - 231/ERROR]: stopTiming called async for world - chunkLoad - Entities