[22:31:06] [Server thread/WARN]: [Cannons] Task #66 for Cannons v2.3.1 generated an exception
java.lang.IllegalArgumentException: Cannot measure distance between old_youchew_survival and world
	at org.bukkit.Location.distanceSquared(Location.java:456) ~[spigot.jar:git-Spigot-f928e7a-994b2aa]
	at org.bukkit.Location.distance(Location.java:439) ~[spigot.jar:git-Spigot-f928e7a-994b2aa]
	at at.pavlov.cannons.cannon.CannonManager.getCannonsInSphere(CannonManager.java:344) ~[?:?]
	at at.pavlov.cannons.utils.CannonsUtil.getNearbyTargets(CannonsUtil.java:835) ~[?:?]
	at at.pavlov.cannons.Aiming.updateSentryMode(Aiming.java:511) ~[?:?]
	at at.pavlov.cannons.Aiming.access$100(Aiming.java:29) ~[?:?]
	at at.pavlov.cannons.Aiming$1.run(Aiming.java:97) ~[?:?]
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-f928e7a-994b2aa]
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot.jar:git-Spigot-f928e7a-994b2aa]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:726) [spigot.jar:git-Spigot-f928e7a-994b2aa]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:367) [spigot.jar:git-Spigot-f928e7a-994b2aa]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:657) [spigot.jar:git-Spigot-f928e7a-994b2aa]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:560) [spigot.jar:git-Spigot-f928e7a-994b2aa]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_05]