Constant Essentials Error that will not let essentials start up on my server

Code:

[22:33:48 ERROR]: java.lang.NoSuchMethodError: java.nio.CharBuffer.subSequence(II)Ljava/nio/CharBuffer;
[22:33:48 ERROR]: Error occurred while enabling Essentials vTeamCity (Is it up to date?)
java.lang.NullPointerException
    at com.earth2me.essentials.Essentials.onDisable(Essentials.java:348) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:323) ~[craftbukkit.jar:git-Bukkit-ba32592]
    at com.earth2me.essentials.Essentials.handleCrash(Essentials.java:747) ~[?:?]
    at com.earth2me.essentials.Essentials.onEnable(Essentials.java:275) ~[?:?]
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[craftbukkit.jar:git-Bukkit-ba32592]
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:327) [craftbukkit.jar:git-Bukkit-ba32592]
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404) [craftbukkit.jar:git-Bukkit-ba32592]
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.loadPlugin(CraftServer.java:341) [craftbukkit.jar:git-Bukkit-ba32592]
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.enablePlugins(CraftServer.java:313) [craftbukkit.jar:git-Bukkit-ba32592]
    at net.minecraft.server.v1_8_R2.MinecraftServer.r(MinecraftServer.java:408) [craftbukkit.jar:git-Bukkit-ba32592]
    at net.minecraft.server.v1_8_R2.MinecraftServer.k(MinecraftServer.java:374) [craftbukkit.jar:git-Bukkit-ba32592]
    at net.minecraft.server.v1_8_R2.MinecraftServer.a(MinecraftServer.java:329) [craftbukkit.jar:git-Bukkit-ba32592]
    at net.minecraft.server.v1_8_R2.DedicatedServer.init(DedicatedServer.java:236) [craftbukkit.jar:git-Bukkit-ba32592]
    at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:501) [craftbukkit.jar:git-Bukkit-ba32592]
    at java.lang.Thread.run(Thread.java:695) [?:1.6.0_65]

Same error over and over again. I just want it fixed...
The version I am using is:
Thank you, Jack Badger

 

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You are using java version 6 to launch your server. Essentials teamcity requires java version 7

 

@emericask8ur Please use the report button next time.