java.lang.ClassNotFoundException: net.minecraft.server.v1_8_

[10:17:57] [Server thread/WARN]: [InfernalMobs] Task #8916 for InfernalMobs v4.0 generated an exception
java.lang.NoClassDefFoundError: net/minecraft/server/v1_8_R2/EnumParticle
	at io.hotmail.com.jacob_vejvoda.infernal_mobs.ParticleEffects.createPacket(ParticleEffects.java:149) ~[?:?]
	at io.hotmail.com.jacob_vejvoda.infernal_mobs.ParticleEffects.sendToLocation(ParticleEffects.java:134) ~[?:?]
	at io.hotmail.com.jacob_vejvoda.infernal_mobs.infernal_mobs.displayEffect(infernal_mobs.java:810) ~[?:?]
	at io.hotmail.com.jacob_vejvoda.infernal_mobs.infernal_mobs.showEffect(infernal_mobs.java:847) ~[?:?]
	at io.hotmail.com.jacob_vejvoda.infernal_mobs.infernal_mobs$4.run(infernal_mobs.java:971) ~[?:?]
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot.jar:git-Spigot-0dd57f3-01930e2]
	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot.jar:git-Spigot-0dd57f3-01930e2]
	at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:726) [spigot.jar:git-Spigot-0dd57f3-01930e2]
	at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:367) [spigot.jar:git-Spigot-0dd57f3-01930e2]
	at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:657) [spigot.jar:git-Spigot-0dd57f3-01930e2]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:560) [spigot.jar:git-Spigot-0dd57f3-01930e2]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_25]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_8_R2.EnumParticle
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[spigot.jar:git-Spigot-0dd57f3-01930e2]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot.jar:git-Spigot-0dd57f3-01930e2]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_25]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_25]
	... 12 more