Вопрос Знатокам по майнкрафту! Почему сервер крашится?

Я создал сервер и он у меня постоянно крашится.
Вот:
----Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 1/4/17 6:57 AM
Description: Exception in server tick loop

java.lang.NoSuchMethodError: org.bukkit.OfflinePlayer.getUniqueId()Ljava/util/UUID;
at com.sk89q.wepif.PermissionsExResolver.hasPermission(PermissionsExResolver.java:68)
at com.sk89q.wepif.PermissionsResolverManager.hasPermission(PermissionsResolverManager.java:173)
at com.sk89q.worldedit.bukkit.BukkitPlayer.hasPermission(BukkitPlayer.java:144)
at com.sk89q.worldedit.internal.command.ActorAuthorizer.testPermission(ActorAuthorizer.java:37)
at com.sk89q.worldedit.util.command.parametric.ParametricCallable.testPermission(ParametricCallable.java:297)
at com.sk89q.worldedit.bukkit.BukkitCommandInspector.testPermission(BukkitCommandInspector.java:77)
at com.sk89q.bukkit.util.DynamicPluginCommand.testPermissionSilent(DynamicPluginCommand.java:99)
at org.bukkit.command.SimpleCommandMap.tabComplete(SimpleCommandMap.java:248)
at org.bukkit.craftbukkit.v1_5_R3.CraftServer.tabCompleteCommand(CraftServer.java:1329)
at org.bukkit.craftbukkit.v1_5_R3.CraftServer.tabComplete(CraftServer.java:1320)
at net.minecraft.server.v1_5_R3.MinecraftServer.a(MinecraftServer.java:892)
at net.minecraft.server.v1_5_R3.PlayerConnection.a(PlayerConnection.java:1629)
at net.minecraft.server.v1_5_R3.Packet203TabComplete.handle(SourceFile:29)
at net.minecraft.server.v1_5_R3.NetworkManager.b(NetworkManager.java:292)
at net.minecraft.server.v1_5_R3.PlayerConnection.d(PlayerConnection.java:115)
at net.minecraft.server.v1_5_R3.ServerConnection.b(SourceFile:35)
at net.minecraft.server.v1_5_R3.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:581)
at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Linux (amd64) version 3.2.0-4-amd64
Java Version: 1.8.0_111, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 591205688 bytes (563 MB) / 939720704 bytes (896 MB) up to 939720704 bytes (896 MB)
JVM Flags: 8 total; -Xms910m -Xmx910m -XX:+UseAdaptiveGCBoundary -XX:SurvivorRatio=4 -XX:UseSSE=3 -XXarallelGCThreads=1 -XX:MaxPermSize=256M -Xincgc
AABB Pool Size: 155 (8680 bytes; 0 MB) allocated, 61 (3416 bytes; 0 MB) used
Suspicious classes: $Proxy1, $Proxy3, $Proxy17, ..[com.avaje.ebean.EbeanServer], [com.avaje.ebean.config.ServerConfig], [com.avaje.ebean.config.dbplatform.DatabasePlatform, SQLitePlatform], [com.google.common.base.Predicate, Function, Joiner, ..], [com.google.common.cache.CacheLoader, FunctionToCacheLoader, SupplierToCacheLoader, ..], [com.google.common.collect.ImmutableCollection, ImmutableList, Maps, ..], [com.google.common.io.Files, OutputSupplier, InputSupplier, ..], [com.google.common.primitives.Chars, CharArrayAsList], [com.google.common.util.concurrent.MoreExecutors, ListeningExecutorService, ListeningScheduledExecutorService, ..], [javax.annotation.Nullable, Nonnull], [net.minecraft.server.v1_5_R3.ICommandListener, IMojangStatistics, Packet, ..], [org.apache.commons.lang.Validate, UnhandledException, StringUtils, ..], [org.apache.commons.lang.exception.Nestable, NestableRuntimeException], [org.bukkit.World, BlockChangeD