[18:50:26] [Server thread/ERROR]: Could not load 'plugins/funnyguilds-3.9.9.4.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: net/dzikoysk/funnyguilds/FunnyGuilds : Unsupported major.minor version 52.0
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:137) ~[spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:314) ~[spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:236) [spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.craftbukkit.v1_7_R1.CraftServer.loadPlugins(CraftServer.java:355) [spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.DedicatedServer.init(DedicatedServer.java:135) [spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:437) [spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
Caused by: java.lang.UnsupportedClassVersionError: net/dzikoysk/funnyguilds/FunnyGuilds : Unsupported major.minor version 52.0
	at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_80]
	at java.lang.ClassLoader.defineClass(ClassLoader.java:800) ~[?:1.7.0_80]
	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.7.0_80]
	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) ~[?:1.7.0_80]
	at java.net.URLClassLoader.access$100(URLClassLoader.java:71) ~[?:1.7.0_80]
	at java.net.URLClassLoader$1.run(URLClassLoader.java:361) ~[?:1.7.0_80]
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[?:1.7.0_80]
	at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_80]
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[?:1.7.0_80]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) ~[spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_80]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_80]
	at java.lang.Class.forName0(Native Method) ~[?:1.7.0_80]
	at java.lang.Class.forName(Class.java:278) ~[?:1.7.0_80]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[spigot-1.7.2-R0.4-SNAPSHOT.jar:git-Spigot-1.7.2-R0.3-122-gb58e277]
	... 6 more