[Server thread/ERROR]: Error occurred while enabling SkAngelTool v0.6 (Is it up to date?)
java.lang.NoClassDefFoundError: com/Acrobot/ChestShop/Events/PreTransactionEvent
	at fr.angelus.skangeltool.Main.onEnable(Main.java:39) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:340) [Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405) [Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugin(CraftServer.java:356) [Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at org.bukkit.craftbukkit.v1_8_R3.CraftServer.enablePlugins(CraftServer.java:316) [Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at net.minecraft.server.v1_8_R3.MinecraftServer.s(MinecraftServer.java:418) [Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at net.minecraft.server.v1_8_R3.MinecraftServer.k(MinecraftServer.java:382) [Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:337) [Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:256) [Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:528) [Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_51]
Caused by: java.lang.ClassNotFoundException: com.Acrobot.ChestShop.Events.PreTransactionEvent
	at java.net.URLClassLoader.findClass(Unknown Source) ~[?:1.8.0_51]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:101) ~[Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[Spigot-1.8.7.jar:git-Spigot-07a5b1b-04afd79]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_51]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_51]
	... 12 more