[Quests] Task #437 for Quests v3.7.4-b${env.BUILD_NUMBER} generated an exception
java.lang.NoClassDefFoundError: net/minecraft/server/v1_8_R1/World
at net.citizensnpcs.npc.CitizensNPCRegistry.getNPC(CitizensNPCRegistry.java:122) ~[?:?]
at net.citizensnpcs.npc.CitizensNPCRegistry.isNPC(CitizensNPCRegistry.java:128) ~[?:?]
at me.blackvein.quests.NpcEffectThread.run(NpcEffectThread.java:40) ~[?:?]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71) ~[gbinvl_minecraft_spigot_1_8_8.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [gbinvl_minecraft_spigot_1_8_8.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:723) [gbinvl_minecraft_spigot_1_8_8.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [gbinvl_minecraft_spigot_1_8_8.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [gbinvl_minecraft_spigot_1_8_8.jar:git-Spigot-21fe707-e1ebe52]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [gbinvl_minecraft_spigot_1_8_8.jar:git-Spigot-21fe707-e1ebe52]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_232]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_8_R1.World
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[gbinvl_minecraft_spigot_1_8_8.jar:git-Spigot-21fe707-e1ebe52]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[gbinvl_minecraft_spigot_1_8_8.jar:git-Spigot-21fe707-e1ebe52]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[?:1.8.0_232]
at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[?:1.8.0_232]
... 10 more