[16:18:32] [Server thread/ERROR]: Could not load 'plugins/AttributeHider.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: com/jakeyray18/AttributeHider : Unsupported major.minor version 52.0
	at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[lostkingdoms_server.jar:git-Spigot-8a983f9-e81edfc]
	at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[lostkingdoms_server.jar:git-Spigot-8a983f9-e81edfc]
	at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [lostkingdoms_server.jar:git-Spigot-8a983f9-e81edfc]
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugins(CraftServer.java:291) [lostkingdoms_server.jar:git-Spigot-8a983f9-e81edfc]
	at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:152) [lostkingdoms_server.jar:git-Spigot-8a983f9-e81edfc]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:505) [lostkingdoms_server.jar:git-Spigot-8a983f9-e81edfc]
	at java.lang.Thread.run(Unknown Source) [?:1.7.0_51]
Caused by: java.lang.UnsupportedClassVersionError: com/jakeyray18/AttributeHider : Unsupported major.minor version 52.0