[06:43:30] [Craft Scheduler Thread - 293/INFO]: An unknown error occurred while attempting to perform this command
[06:43:30] [Craft Scheduler Thread - 293/WARN]: Unknown CommandBlock failed to handle command
java.lang.NullPointerException
	at it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap$MapIterator.nextEntry(Long2ObjectOpenHashMap.java:511) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap$ValueIterator.next(Long2ObjectOpenHashMap.java:706) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at net.minecraft.server.v1_11_R1.ChunkProviderServer.a(ChunkProviderServer.java:224) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at net.minecraft.server.v1_11_R1.WorldServer.save(WorldServer.java:1005) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at net.minecraft.server.v1_11_R1.CommandSaveAll.execute(SourceFile:41) ~[spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.craftbukkit.v1_11_R1.command.VanillaCommandWrapper.dispatchVanillaCommand(VanillaCommandWrapper.java:109) [spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.craftbukkit.v1_11_R1.command.VanillaCommandWrapper.execute(VanillaCommandWrapper.java:38) [spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.craftbukkit.v1_11_R1.CraftServer.dispatchCommand(CraftServer.java:650) [spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at com.package.e.run(l:140) [AzDelayCommand.jar:?]
	at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftTask.run(CraftTask.java:71) [spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at org.bukkit.craftbukkit.v1_11_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:52) [spigot.jar:git-Spigot-3fb9445-6e3cec8]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_221]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_221]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_221]