[11:13:02] [Server thread/WARN]: [Quests] Task #45 for Quests v1.8.1 generated an exception
java.lang.NoClassDefFoundError: net/minecraft/server/v1_7_R1/Packet
	at me.blackvein.quests.NpcEffectThread.showEffect(NpcEffectThread.java:93) ~[?:?]
	at me.blackvein.quests.NpcEffectThread.run(NpcEffectThread.java:34) ~[?:?]
	at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot-1.8.jar:git-Spigot-52c130f-81ab957]
	at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot-1.8.jar:git-Spigot-52c130f-81ab957]
	at net.minecraft.server.v1_8_R1.MinecraftServer.z(MinecraftServer.java:694) [spigot-1.8.jar:git-Spigot-52c130f-81ab957]
	at net.minecraft.server.v1_8_R1.DedicatedServer.z(DedicatedServer.java:316) [spigot-1.8.jar:git-Spigot-52c130f-81ab957]
	at net.minecraft.server.v1_8_R1.MinecraftServer.y(MinecraftServer.java:623) [spigot-1.8.jar:git-Spigot-52c130f-81ab957]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:526) [spigot-1.8.jar:git-Spigot-52c130f-81ab957]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_31]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_7_R1.Packet
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[spigot-1.8.jar:git-Spigot-52c130f-81ab957]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot-1.8.jar:git-Spigot-52c130f-81ab957]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_31]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_31]
	... 9 more