[15:30:11] [Server thread/INFO]: [WorldBorder] world: uhc_world  padding: 208  repeats: 50  ticks: 1
[15:30:11] [Server thread/WARN]: [UHC] Task #31 for UHC v1.0 generated an exception
org.bukkit.command.CommandException: Unhandled exception executing command 'wb' in plugin WorldBorder v1.8.1
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[hSpigot.jar:git-PaperSpigot-f2f48c5]
	at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:181) ~[hSpigot.jar:git-PaperSpigot-f2f48c5]
	at org.bukkit.craftbukkit.v1_7_R4.CraftServer.dispatchCommand(CraftServer.java:765) ~[hSpigot.jar:git-PaperSpigot-f2f48c5]
	at org.bukkit.Bukkit.dispatchCommand(Bukkit.java:332) ~[hSpigot.jar:git-PaperSpigot-f2f48c5]
	at net.raauhh.uhc.e.h.a.lambda$null$0(a.java) ~[?:?]
	at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftTask.run(CraftTask.java:71) ~[hSpigot.jar:git-PaperSpigot-f2f48c5]
	at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [hSpigot.jar:git-PaperSpigot-f2f48c5]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:700) [hSpigot.jar:git-PaperSpigot-f2f48c5]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:303) [hSpigot.jar:git-PaperSpigot-f2f48c5]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:642) [hSpigot.jar:git-PaperSpigot-f2f48c5]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:548) [hSpigot.jar:git-PaperSpigot-f2f48c5]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [hSpigot.jar:git-PaperSpigot-f2f48c5]
Caused by: java.lang.NullPointerException
	at com.wimbli.WorldBorder.WorldFileData.create(WorldFileData.java:39) ~[?:?]
	at com.wimbli.WorldBorder.WorldFillTask.<init>(WorldFillTask.java:87) ~[?:?]
	at com.wimbli.WorldBorder.cmd.CmdFill.execute(CmdFill.java:129) ~[?:?]
	at com.wimbli.WorldBorder.WBCommand.onCommand(WBCommand.java:139) ~[?:?]
	at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[hSpigot.jar:git-PaperSpigot-f2f48c5]
	... 11 more
[15:30:11] [Craft Scheduler Thread - 3/INFO]: [UHC] Please set Emerald Mined's hologram using /uhc sethologram emerald_mined
[15:30:28] [Server thread/WARN]: net.minecraft.server.v1_7_R4.ExceptionWorldConflict: Failed to check session lock for world located at ./uhc_world, aborting. Stop the server and delete the session.lock in this world to prevent further issues.
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.WorldNBTStorage.checkSession(WorldNBTStorage.java:78)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.World.G(World.java:3002)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.ChunkRegionLoader.a(ChunkRegionLoader.java:130)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.ChunkProviderServer.saveChunk(ChunkProviderServer.java:269)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.ChunkProviderServer.unloadChunks(ChunkProviderServer.java:363)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.WorldServer.doTick(WorldServer.java:187)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:749)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:303)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:642)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:548)
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628)
[15:30:28] [Server thread/WARN]: net.minecraft.server.v1_7_R4.ExceptionWorldConflict: Failed to check session lock for world located at ./uhc_world, aborting. Stop the server and delete the session.lock in this world to prevent further issues.
[15:30:28] [Server thread/WARN]: 	at net.minecraft.server.v1_7_R4.WorldNBTStorage.checkSession(WorldNBTStorage.java:78)