[21:15:31 ERROR]: Error occurred while enabling Tablist-Prefix v4.0 (Is it up to date?)
java.lang.NoClassDefFoundError: net/minecraft/server/v1_8_R3/Packet
        at de.ReavMC.Tablist.main.Main.fetchClasses(Main.java:42) ~[?:?]
        at de.ReavMC.Tablist.main.Main.onEnable(Main.java:31) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:291) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.loadPlugin(CraftServer.java:361) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.enablePlugins(CraftServer.java:321) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.reload(CraftServer.java:745) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.Bukkit.reload(Bukkit.java:539) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchCommand(CraftServer.java:645) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchServerCommand(CraftServer.java:631) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at net.minecraft.server.v1_9_R1.DedicatedServer.aL(DedicatedServer.java:437) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:401) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:655) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:554) [Spigot.jar:git-Spigot-7d15d07-c194444]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_8_R3.Packet
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[Spigot.jar:git-Spigot-7d15d07-c194444]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_144]
        ... 18 more