[23:10:19 WARN]: Caused by: java.lang.IllegalStateException: Asynchronous entity world add!
[23:10:19 WARN]: 	at org.spigotmc.AsyncCatcher.catchOp(AsyncCatcher.java:14)
[23:10:19 WARN]: 	at net.minecraft.server.v1_8_R3.World.b(World.java:2738)
[23:10:19 WARN]: 	at net.minecraft.server.v1_8_R3.Chunk.addEntities(Chunk.java:912)
[23:10:19 WARN]: 	at org.bukkit.craftbukkit.v1_8_R3.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:49)
[23:10:19 WARN]: 	at org.bukkit.craftbukkit.v1_8_R3.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:1)
[23:10:19 WARN]: 	at org.bukkit.craftbukkit.v1_8_R3.util.AsynchronousExecutor.skipQueue(AsynchronousExecutor.java:337)
[23:10:19 WARN]: 	at org.bukkit.craftbukkit.v1_8_R3.util.AsynchronousExecutor.getSkipQueue(AsynchronousExecutor.java:295)
[23:10:19 WARN]: 	at org.bukkit.craftbukkit.v1_8_R3.chunkio.ChunkIOExecutor.syncChunkLoad(ChunkIOExecutor.java:16)
[23:10:19 WARN]: 	at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:135)
[23:10:19 WARN]: 	at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:117)
[23:10:19 WARN]: 	at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.getChunkAt(CraftWorld.java:145)
[23:10:19 WARN]: 	at com.iridium.iridiumcore.multiversion.MultiVersion_V1_8_R3.getChunkAt(MultiVersion_V1_8_R3.java:37)
[23:10:19 WARN]: 	at com.iridium.iridiumskyblock.managers.IslandManager.lambda$getIslandChunks$14(IslandManager.java:291)
[23:10:19 WARN]: 	at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
[23:10:19 WARN]: 	... 6 more