[12:31:47] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing 'pet help' in io.github.dsh105.echopet.commands.util.DynamicPluginCommand(pet)
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:184) ~[spigot.jar:git-Spigot-1354]
    at org.bukkit.craftbukkit.v1_7_R2.CraftServer.dispatchCommand(CraftServer.java:709) ~[spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.PlayerConnection.handleCommand(PlayerConnection.java:984) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.PlayerConnection.a(PlayerConnection.java:829) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.NetworkManager.a(NetworkManager.java:148) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.ServerConnection.c(ServerConnection.java:77) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.MinecraftServer.v(MinecraftServer.java:703) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.DedicatedServer.v(DedicatedServer.java:273) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.MinecraftServer.u(MinecraftServer.java:566) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java:472) [spigot.jar:git-Spigot-1354]
    at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:618) [spigot.jar:git-Spigot-1354]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R1/Packet
    at io.github.dsh105.echopet.commands.HelpEntry.getFancyMessage(HelpEntry.java:97) ~[?:?]
    at io.github.dsh105.echopet.commands.PetCommand.getHelp(PetCommand.java:56) ~[?:?]
    at io.github.dsh105.echopet.commands.PetCommand.onCommand(PetCommand.java:271) ~[?:?]
    at io.github.dsh105.echopet.commands.util.DynamicPluginCommand.execute(DynamicPluginCommand.java:45) ~[?:?]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[spigot.jar:git-Spigot-1354]
    ... 12 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_7_R1.Packet
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:67) ~[spigot.jar:git-Spigot-1354]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[spigot.jar:git-Spigot-1354]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_20-ea]
    at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_20-ea]
    at io.github.dsh105.echopet.commands.HelpEntry.getFancyMessage(HelpEntry.java:97) ~[?:?]
    at io.github.dsh105.echopet.commands.PetCommand.getHelp(PetCommand.java:56) ~[?:?]
    at io.github.dsh105.echopet.commands.PetCommand.onCommand(PetCommand.java:271) ~[?:?]
    at io.github.dsh105.echopet.commands.util.DynamicPluginCommand.execute(DynamicPluginCommand.java:45) ~[?:?]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:180) ~[spigot.jar:git-Spigot-1354]
    ... 12 more