21:04:59] [Server thread/INFO]: Starting minecraft server version 1.7.8
[21:04:59] [Server thread/INFO]: Loading properties
[21:04:59] [Server thread/INFO]: Default game type: SURVIVAL
[21:05:00] [Server thread/INFO]: This server is running CraftBukkit version git-Spigot-1433 (MC: 1.7.8) (Implementing API version 1.7.8-R0.1-SNAPSHOT)
[21:05:00] [Server thread/INFO]: Server Ping Player Sample Count: 12
[21:05:00] [Server thread/INFO]: Using 4 threads for Netty based IO
[21:05:00] [Server thread/INFO]: Generating keypair
[21:05:00] [Server thread/INFO]: Starting Minecraft server on 93.91.250.137:27710
[21:05:00] [Server thread/ERROR]: Could not load 'plugins/MassiveCore.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R4/PlayerInventory
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:131) ~[minecraft_server.jar:git-Spigot-1433]
at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:329) ~[minecraft_server.jar:git-Spigot-1433]
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [minecraft_server.jar:git-Spigot-1433]
at org.bukkit.craftbukkit.v1_7_R3.CraftServer.loadPlugins(CraftServer.java:362) [minecraft_server.jar:git-Spigot-1433]
at net.minecraft.server.v1_7_R3.DedicatedServer.init(DedicatedServer.java:135) [minecraft_server.jar:git-Spigot-1433]
at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:450) [minecraft_server.jar:git-Spigot-1433]
at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [minecraft_server.jar:git-Spigot-1433]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R4/PlayerInventory
at com.massivecraft.massivecore.MassiveCore.getMassiveCoreGsonBuilder(MassiveCore.java:85) ~[?:?]
at com.massivecraft.massivecore.MassiveCore.<clinit>(MassiveCore.java:70) ~[?:?]
at java.lang.Class.forName0(Native Method) ~[?:1.7.0_60]
at java.lang.Class.forName(Class.java:270) ~[?:1.7.0_60]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[minecraft_server.jar:git-Spigot-1433]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) ~[minecraft_server.jar:git-Spigot-1433]
... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_7_R4.PlayerInventory
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:67) ~[minecraft_server.jar:git-Spigot-1433]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[minecraft_server.jar:git-Spigot-1433]
at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_60]
at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_60]
at com.massivecraft.massivecore.MassiveCore.getMassiveCoreGsonBuilder(MassiveCore.java:85) ~[?:?]
at com.massivecraft.massivecore.MassiveCore.<clinit>(MassiveCore.java:70) ~[?:?]
at java.lang.Class.forName0(Native Method) ~[?:1.7.0_60]
at java.lang.Class.forName(Class.java:270) ~[?:1.7.0_60]
at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[minecraft_server.jar:git-Spigot-1433]
at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:127) ~[minecraft_server.jar:git-Spigot-1433]
... 6 more
[21:05:00] [Server thread/ERROR]: [code][/code]