Fehler

[21:47:55 INFO]: Starting minecraft server version 1.8.8
[21:47:55 INFO]: Loading properties
[21:47:55 INFO]: Default game type: SURVIVAL
[21:47:55 INFO]: This server is running CraftBukkit version git-Spigot-db6de12-18fbb24 (MC: 1.8.8) (Implementing API version 1.8.8-R0.1-SNAPSHOT)
[21:47:55 INFO]: Debug logging is disabled
[21:47:55 INFO]: Server Ping Player Sample Count: 12
[21:47:55 INFO]: Using 4 threads for Netty based IO
[21:47:55 INFO]: Generating keypair
[21:47:55 INFO]: Starting Minecraft server on *:25565
[21:47:55 INFO]: Using default channel type
[21:47:56 INFO]: Set PluginClassLoader as parallel capable
[21:47:56 ERROR]: Could not load 'plugins\Lobby.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: Cannot find main class `net.devs.lobbySystem.Main'
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:66) ~[Spigot.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[Spigot.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[Spigot.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [Spigot.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:292) [Spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:198) [Spigot.jar:git-Spigot-db6de12-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [Spigot.jar:git-Spigot-db6de12-18fbb24]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_151]
Caused by: java.lang.ClassNotFoundException: net.devs.lobbySystem.Main
        at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_151]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[Spigot.jar:git-Spigot-db6de12-18fbb24]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[Spigot.jar:git-Spigot-db6de12-18fbb24]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_151]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_151]
        at java.lang.Class.forName0(Native Method) ~[?:1.8.0_151]
        at java.lang.Class.forName(Unknown Source) ~[?:1.8.0_151]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:64) ~[Spigot.jar:git-Spigot-db6de12-18fbb24]
        ... 7 more