Problem/Bug [22:22:07] [Server thread/ERROR]: Could not load 'plugins/PerWorldPlugins.jar' in folder 'plugins'

Code:

[22:22:07] [Server thread/ERROR]: Could not load 'plugins/PerWorldPlugins.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: me/incomprehendable/dev/pwp/PerWorldPlugins : Unsupported major.minor version 52.0
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
at org.bukkit.craftbukkit.v1_11_R1.CraftServer.loadPlugins(CraftServer.java:301) [spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
at net.minecraft.server.v1_11_R1.DedicatedServer.init(DedicatedServer.java:204) [spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:544) [spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_101]
Caused by: java.lang.UnsupportedClassVersionError: me/incomprehendable/dev/pwp/PerWorldPlugins : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_101]
at java.lang.ClassLoader.defineClass(ClassLoader.java:803) ~[?:1.7.0_101]
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.7.0_101]
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) ~[?:1.7.0_101]
at java.net.URLClassLoader.access$100(URLClassLoader.java:71) ~[?:1.7.0_101]
at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[?:1.7.0_101]
at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[?:1.7.0_101]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_101]
at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[?:1.7.0_101]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_101]
at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_101]
at java.lang.Class.forName0(Native Method) ~[?:1.7.0_101]
at java.lang.Class.forName(Class.java:278) ~[?:1.7.0_101]
at org.bukkit.plugin.java.PluginClassLoader.(PluginClassLoader.java:64) ~[spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[spigotmc-1.11.2-R0.1.jar:git-Spigot-283de8b-2ad21b8]
... 6 more

help pls (i use spigotmc-1.11.2RO.1)

 

This says you are using Java 7. You Need to use Java 8 in order to run this plugin. If you run your server on your computer, just update to 1.8. If you are using a hosting company, ask them to update to java 8.