[19:28:30 ERROR]: Could not load 'plugins/SurvivalGames.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `de.name.survivalgames.SurvivalGames'
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:191) ~[PluginClassLoader.class:git-spigot1.7.10-1.1307.06.218]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:145) ~[JavaPluginLoader.class:git-spigot1.7.10-1.1307.06.218]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:334) ~[SimplePluginManager.class:git-spigot1.7.10-1.1307.06.218]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:256) [SimplePluginManager.class:git-spigot1.7.10-1.1307.06.218]
at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugins(CraftServer.java:320) [CraftServer.class:git-spigot1.7.10-1.1307.06.218]
at net.minecraft.world.storage.SaveHandler.initBukkitData(SaveHandler.java:458) [ayq.class:?]
at net.minecraft.world.storage.SaveHandler.func_75757_d(SaveHandler.java:136) [ayq.class:?]
at net.minecraft.world.World.<init>(World.java:350) [ahb.class:?]
at net.minecraft.world.WorldServer.<init>(WorldServer.java:153) [mt.class:?]
at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:356) [MinecraftServer.class:?]
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:329) [lt.class:?]
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:620) [MinecraftServer.class:?]
at java.lang.Thread.run(Unknown Source) [?:1.7.0_71]
Caused by: java.lang.ClassNotFoundException: Failed to remap class de.name.survivalgames.SurvivalGames
at org.bukkit.plugin.java.PluginClassLoader.remappedFindClass(PluginClassLoader.java:488) ~[PluginClassLoader.class:git-spigot1.7.10-1.1307.06.218]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:409) ~[PluginClassLoader.class:git-spigot1.7.10-1.1307.06.218]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:211) ~[PluginClassLoader.class:git-spigot1.7.10-1.1307.06.218]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_71]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_71]
at java.lang.Class.forName0(Native Method) ~[?:1.7.0_71]
at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_71]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:189) ~[PluginClassLoader.class:git-spigot1.7.10-1.1307.06.218]
... 12 more
Caused by: java.lang.UnsupportedClassVersionError: de/name/survivalgames/SurvivalGames : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_71]
at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_71]
at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_71]
at org.bukkit.plugin.java.PluginClassLoader.remappedFindClass(PluginClassLoader.java:476) ~[PluginClassLoader.class:git-spigot1.7.10-1.1307.06.218]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:409) ~[PluginClassLoader.class:git-spigot1.7.10-1.1307.06.218]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:211) ~[PluginClassLoader.class:git-spigot1.7.10-1.1307.06.218]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_71]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_71]
at java.lang.Class.forName0(Native Method) ~[?:1.7.0_71]
at java.lang.Class.forName(Unknown Source) ~[?:1.7.0_71]