Problem/Bug verry important ploblem

i have a very important question about a critical error on the console and that stops the chunk loading so ther missing chunks evry where in my plotworld can you plz help me this is the error‏

java.util.concurrent.ExecutionException: net.minecraft.server.v1_8_R1.ReportedException: Exception generating new chunk
at java.util.concurrent.FutureTask.report(Unknown Source) ~[?:1.8.0_45]
at java.util.concurrent.FutureTask.get(Unknown Source) ~[?:1.8.0_45]
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:657) [craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:284) [craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:609) [craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:517) [craftbukkit.jar:git-Bukkit-3fc97ff]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]
Caused by: net.minecraft.server.v1_8_R1.ReportedException: Exception generating new chunk
at net.minecraft.server.v1_8_R1.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:147) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:116) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerChunk.<init>(PlayerChunk.java:36) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerChunkMap.a(PlayerChunkMap.java:91) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerChunkMap.b(PlayerChunkMap.java:170) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerChunkMap.movePlayer(PlayerChunkMap.java:247) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerList.d(PlayerList.java:298) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:428) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PacketPlayInFlying.a(SourceFile:126) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PacketPlayInPositionLook.a(SourceFile:18) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_45]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_45]
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:656) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
... 4 more
Caused by: java.lang.NullPointerException
at com.worldcretornica.plotme.defaultgenerator.DefaultChunkGenerator.generateExtBlockSections(DefaultChunkGenerator.java:45) ~[?:?]
at org.bukkit.craftbukkit.v1_8_R1.generator.CustomChunkGenerator.getOrCreateChunk(CustomChunkGenerator.java:53) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:139) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:116) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerChunk.<init>(PlayerChunk.java:36) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerChunkMap.a(PlayerChunkMap.java:91) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerChunkMap.b(PlayerChunkMap.java:170) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerChunkMap.movePlayer(PlayerChunkMap.java:247) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerList.d(PlayerList.java:298) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PlayerConnection.a(PlayerConnection.java:428) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PacketPlayInFlying.a(SourceFile:126) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PacketPlayInPositionLook.a(SourceFile:18) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at net.minecraft.server.v1_8_R1.PacketHandleTask.run(SourceFile:13) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) ~[?:1.8.0_45]
at java.util.concurrent.FutureTask.run(Unknown Source) ~[?:1.8.0_45]
at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:656) ~[craftbukkit.jar:git-Bukkit-3fc97ff]
... 4 more
[14:31:01] [Server thread/FATAL]: Handling task‏

 

It looks like an error with the PlotMe world generator. I suggest that you send this error to the plugin developer and in the mean time, try removing the plugin and if you're still having issues then delete the world and start over.