[11:45:02] [Server thread/WARN]: [ParticleEffects] Task #494142 for ParticleEffects v1.1 generated an exception
java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R1/Packet
	at me.TheRage66.ParticleEffects.ParticleEffects$20.run(ParticleEffects.java:1042) ~[?:?]
	at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftTask.run(CraftTask.java:58) ~[spigot.jar:git-Spigot-1486]
	at org.bukkit.craftbukkit.v1_7_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345) [spigot.jar:git-Spigot-1486]
	at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:635) [spigot.jar:git-Spigot-1486]
	at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:283) [spigot.jar:git-Spigot-1486]
	at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:583) [spigot.jar:git-Spigot-1486]
	at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:489) [spigot.jar:git-Spigot-1486]
	at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) [spigot.jar:git-Spigot-1486]
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-1486]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[spigot.jar:git-Spigot-1486]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_55]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_55]
	... 8 more