Hey, when I start the Server, my plugin give me this Error: Code (Text): [16:02:25] [Server thread/ERROR]: Could not load 'plugins/Labor.jar' in folder 'plugins' org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: de/Labor/www/Main : Unsupported major.minor version 52.0 at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:292) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.reload(CraftServer.java:739) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.Bukkit.reload(Bukkit.java:535) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchServerCommand(CraftServer.java:627) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at net.minecraft.server.v1_8_R3.DedicatedServer.aO(DedicatedServer.java:412) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:375) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:653) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:556) [spigot_server.jar:git-Spigot-fdc1440-53fac9f] at java.lang.Thread.run(Thread.java:745) [?:1.7.0_101] Caused by: java.lang.UnsupportedClassVersionError: de/Labor/www/Main : 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) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f] 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.<init>(PluginClassLoader.java:64) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f] at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[spigot_server.jar:git-Spigot-fdc1440-53fac9f] ... 14 more Can somebody help me? Best wishes, Tobias
What's the output of Code (Text): java -version ...on your server? The error means the plugin is compiled in a version of Java later than the one on the server.
Most likely, you have Java 8 installed, but you still use Java 7. Send us what @dwilson390 said above, java -version should display which version you're running.
