Error

[19:25:03 INFO]: [ProjectKorra] Enabling ProjectKorra v1.8.0 BETA 2
[19:25:04 ERROR]: Error occurred while enabling ProjectKorra v1.8.0 BETA 2 (Is i
t up to date?)
java.lang.UnsupportedClassVersionError: me/Soringaming/WaterWhip/WaterWhipAddon
: Unsupported major.minor version 52.0
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_76]
        at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_76]
        at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0
_76]
        at java.net.URLClassLoader.defineClass(Unknown Source) ~[?:1.7.0_76]
        at java.net.URLClassLoader.access$100(Unknown Source) ~[?:1.7.0_76]
        at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_76]
        at java.net.URLClassLoader$1.run(Unknown Source) ~[?:1.7.0_76]
        at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_
76]
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.7.0_76]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_76]
        at java.net.FactoryURLClassLoader.loadClass(Unknown Source) ~[?:1.7.0_76
]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_76]
        at java.lang.Class.forName0(Native Method) ~[?:1.7.0_76]
        at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_76]
        at com.projectkorra.projectkorra.util.AbilityLoader.load(AbilityLoader.j
ava:84) ~[?:?]
        at com.projectkorra.projectkorra.ability.AbilityModuleManager.<init>(Abi
lityModuleManager.java:73) ~[?:?]
        at com.projectkorra.projectkorra.ProjectKorra.onEnable(ProjectKorra.java
:56) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[s
pigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader
.java:340) [spigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManage
r.java:405) [spigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.jav
a:357) [spigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.
java:317) [spigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:4
14) [spigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:3
78) [spigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:3
33) [spigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.jav
a:263) [spigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java
:524) [spigot-1.8.8.jar:git-Spigot-d97e08b-880a532]
        at java.lang.Thread.run(Unknown Source) [?:1.7.0_76]
[19:25:04 INFO]: [BendingGUI] Enabling BendingGUI v1.0.6

...End