プラグインCitizens

プラグイン：Citizens_2.0.13.jar
サーバ：spigot-1.7.10-R0.1-SNAPSHOT_1641.jar
エラーで動きませんでした・・・サイトに説明が書いてない気がしたけど、どうもTownyと連動してくれてるらしいが、Towny側でエラーになっちゃう系。
Towny側はTowny_v0.88.0.0.jar

[12:08:21] [Server thread/WARN]: [Towny] Task #56 for Towny v0.88.0.0_(1.7.2) generated an exception
java.lang.NoClassDefFoundError: net/citizensnpcs/api/CitizensAPI
at com.palmergames.bukkit.towny.tasks.MobRemovalTimerTask.run(MobRemovalTimerTask.java:119) ~[?:?]
at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftTask.run(CraftTask.java:71) ~[spigot-1.7.10-R0.1-SNAPSHOT_1641.jar:git-Spigot-1641]
at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [spigot-1.7.10-R0.1-SNAPSHOT_1641.jar:git-Spigot-1641]
at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:641) [spigot-1.7.10-R0.1-SNAPSHOT_1641.jar:git-Spigot-1641]
at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [spigot-1.7.10-R0.1-SNAPSHOT_1641.jar:git-Spigot-1641]
at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [spigot-1.7.10-R0.1-SNAPSHOT_1641.jar:git-Spigot-1641]
at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [spigot-1.7.10-R0.1-SNAPSHOT_1641.jar:git-Spigot-1641]
at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [spigot-1.7.10-R0.1-SNAPSHOT_1641.jar:git-Spigot-1641]
Caused by: java.lang.ClassNotFoundException: net.citizensnpcs.api.CitizensAPI
at java.net.URLClassLoader$1.run(URLClassLoader.java:366) ~[?:1.7.0_65]
at java.net.URLClassLoader$1.run(URLClassLoader.java:355) ~[?:1.7.0_65]
at java.security.AccessController.doPrivileged(Native Method) ~[?:1.7.0_65]
at java.net.URLClassLoader.findClass(URLClassLoader.java:354) ~[?:1.7.0_65]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[spigot-1.7.10-R0.1-SNAPSHOT_1641.jar:git-Spigot-1641]
at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[spigot-1.7.10-R0.1-SNAPSHOT_1641.jar:git-Spigot-1641]
at java.lang.ClassLoader.loadClass(ClassLoader.java:425) ~[?:1.7.0_65]
at java.lang.ClassLoader.loadClass(ClassLoader.java:358) ~[?:1.7.0_65]
… 8 more