CommandBlockerUltimate error

[13:46:54 WARN]: [CBU] Detected non-standard command map - Aliases may fail to r
esolve. It is possible that it has been replaced by a plugin or you are using an
 incompatible fork. Found this command map: me.incomprehendable.dev.pwp.FakeSimp
leCommandMap
[13:46:54 WARN]: [CBU] Server software: CraftBukkit 1.8.3-R0.1-SNAPSHOT
[13:46:54 WARN]: java.lang.NoSuchFieldException: knownCommands
[13:46:54 WARN]:        at java.lang.Class.getDeclaredField(Unknown Source)
[13:46:54 WARN]:        at io.github.xxyy.cmdblocker.spigot.config.SpigotAliasRe
solver.stealCommandMap(SpigotAliasResolver.java:89)
[13:46:54 WARN]:        at io.github.xxyy.cmdblocker.spigot.config.SpigotAliasRe
solver.refreshMap(SpigotAliasResolver.java:50)
[13:46:54 WARN]:        at io.github.xxyy.cmdblocker.common.config.CBUConfig.res
olveAliases(CBUConfig.java:111)
[13:46:54 WARN]:        at io.github.xxyy.cmdblocker.spigot.CommandBlockerPlugin
$1.run(CommandBlockerPlugin.java:70)
[13:46:54 WARN]:        at org.bukkit.craftbukkit.v1_8_R2.scheduler.CraftTask.ru
n(CraftTask.java:53)
[13:46:54 WARN]:        at org.bukkit.craftbukkit.v1_8_R2.scheduler.CraftSchedul
er.mainThreadHeartbeat(CraftScheduler.java:349)
[13:46:54 WARN]:        at net.minecraft.server.v1_8_R2.MinecraftServer.A(Minecr
aftServer.java:677)
[13:46:54 WARN]:        at net.minecraft.server.v1_8_R2.DedicatedServer.A(Dedica
tedServer.java:336)
[13:46:54 WARN]:        at net.minecraft.server.v1_8_R2.MinecraftServer.z(Minecr
aftServer.java:626)
[13:46:54 WARN]:        at net.minecraft.server.v1_8_R2.MinecraftServer.run(Mine
craftServer.java:534)
[13:46:54 WARN]:        at java.lang.Thread.run(Unknown Source)
[13:46:54 WARN]: [CBU] Could not get CraftBukkit command map! That probably mean
s that they changed their internals.Please contact the plugin author at devnull@
nowak-at.net or http://irc.spi.gt/iris/?channels=lit ! Thank you!
[13:46:54 WARN]: [CBU] This means that we can't get aliases for Bukkit and Minec
raft built-in commands. Sorry for that!