CreativeGates not working

[RushDZN]

My CreativeGates is not working, can you give me a help?

[11:49:51 INFO]: [CreativeGates 2.11.0] === ENABLE START ===
[11:49:51 ERROR]: Error occurred while enabling CreativeGates v2.11.0 (Is it up
to date?)
java.lang.NullPointerException: null
at com.massivecraft.massivecore.MassivePlugin.checkVersionSynchronizatio
n(MassivePlugin.java:117) ~[?:?]
at com.massivecraft.massivecore.MassivePlugin.onEnablePre(MassivePlugin.
java:96) ~[?:?]
at com.massivecraft.massivecore.MassivePlugin.onEnable(MassivePlugin.jav
a:81) ~[?:?]
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:264) ~[c
raftbukkit-1.12.jar:git-Bukkit-7638276]
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:329) [craftbukkit-1.12.jar:git-Bukkit-7638276]
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:401) [craftbukkit-1.12.jar:git-Bukkit-7638276]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugin(CraftServer.
java:361) [craftbukkit-1.12.jar:git-Bukkit-7638276]
at org.bukkit.craftbukkit.v1_12_R1.CraftServer.enablePlugins(CraftServer
.java:323) [craftbukkit-1.12.jar:git-Bukkit-7638276]
at net.minecraft.server.v1_12_R1.MinecraftServer.t(MinecraftServer.java:
411) [craftbukkit-1.12.jar:git-Bukkit-7638276]
at net.minecraft.server.v1_12_R1.MinecraftServer.l(MinecraftServer.java:
372) [craftbukkit-1.12.jar:git-Bukkit-7638276]
at net.minecraft.server.v1_12_R1.MinecraftServer.a(MinecraftServer.java:
327) [craftbukkit-1.12.jar:git-Bukkit-7638276]
at net.minecraft.server.v1_12_R1.DedicatedServer.init(DedicatedServer.ja
va:244) [craftbukkit-1.12.jar:git-Bukkit-7638276]
at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.jav
a:521) [craftbukkit-1.12.jar:git-Bukkit-7638276]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]

Multiverse-Core v2.5.0-b727
CreativeGates v2.11.0