Minigame party error

[00:00:10] [Server thread/ERROR]: Could not pass event ProjectileHitEvent to MinigamesParty v1.3.1
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427) ~[craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:481) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:466) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at org.bukkit.craftbukkit.v1_7_R1.event.CraftEventFactory.callProjectileHitEvent(CraftEventFactory.java:603) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.EntityProjectile.h(EntityProjectile.java:157) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.World.entityJoinedWorld(World.java:1338) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.World.playerJoinedWorld(World.java:1319) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.World.tickEntities(World.java:1207) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.WorldServer.tickEntities(WorldServer.java:480) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:637) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
Caused by: java.lang.NoSuchMethodError: org.bukkit.entity.Projectile.getShooter()Lorg/bukkit/projectiles/ProjectileSource;
	at com.comze_instancelabs.minigamesparty.Main.onProjectileLand(Main.java:769) ~[?:?]
	at sun.reflect.GeneratedMethodAccessor453.invoke(Unknown Source) ~[?:?]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_45]
	at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_45]
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425) ~[craftbukkit_latest_development_build_1.7.2_r0.3_%232975.jar:git-Bukkit-1.7.2-R0.2-1-gbafd450-b2975jnks]
	... 14 more