Bukkit

What steps will reproduce the problem?
1. use a shout such as dragon breath
2.
3.

What is the expected output? What do you see instead?
fire breath XD

an internal error occurred in chat and this error below in console

What version of the product are you using?
1.79

Do you have an error log of what happened?

[08:17:49 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'shou
t' in plugin Dragon_Shouts v1.5
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spi
got.jar:git-Spigot-1543]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:18
1) ~[spigot.jar:git-Spigot-1543]
        at org.bukkit.craftbukkit.v1_7_R3.CraftServer.dispatchCommand(CraftServe
r.java:767) ~[spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.PlayerConnection.handleCommand(PlayerCon
nection.java:1015) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java
:845) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.PacketPlayInChat.a(PacketPlayInChat.java
:28) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.PacketPlayInChat.handle(PacketPlayInChat
.java:65) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:184
) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.ServerConnection.c(ServerConnection.java
:81) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:7
31) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:2
84) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:5
84) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java
:490) [spigot.jar:git-Spigot-1543]
        at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:6
28) [spigot.jar:git-Spigot-1543]
Caused by: java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R4/Packet
        at net.mcshockwave.DragonShouts.Shout.shout(Shout.java:357) ~[?:?]
        at net.mcshockwave.DragonShouts.Commands.ShoutCommand.onCommand(ShoutCom
mand.java:147) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spi
got.jar:git-Spigot-1543]
        ... 13 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_7_R4.Packet

        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:67) ~[spigot.jar:git-Spigot-1543]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.
java:62) ~[spigot.jar:git-Spigot-1543]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_11]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_11]
        at net.mcshockwave.DragonShouts.Shout.shout(Shout.java:357) ~[?:?]
        at net.mcshockwave.DragonShouts.Commands.ShoutCommand.onCommand(ShoutCom
mand.java:147) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spi
got.jar:git-Spigot-1543]
        ... 13 more

Please provide any additional information below.