[Server thread/INFO]: [Skellett] Enabling Skellett v1.9.7
[Server thread/INFO]: [Skellett] The item merge event is only for 1.9+ versions!
[Server thread/INFO]: [Skellett] The offhand switch event is only for 1.9+ versions!
[Server thread/INFO]: [Skellett] The breeding event is only for 1.10+ versions!
[Server thread/ERROR]: Error occurred while enabling Skellett v1.9.7 (Is it up to date?)
java.lang.NoClassDefFoundError: org/bukkit/event/entity/SpawnerSpawnEvent
	at com.gmail.thelimeglass.Register.events(Register.java:528) ~[?:?]
	at com.gmail.thelimeglass.Skellett.onEnable(Skellett.java:204) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321) ~[craftbukkit-1.8.jar:git-Bukkit-7019900]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:327) [craftbukkit-1.8.jar:git-Bukkit-7019900]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404) [craftbukkit-1.8.jar:git-Bukkit-7019900]
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugin(CraftServer.java:341) [craftbukkit-1.8.jar:git-Bukkit-7019900]
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.enablePlugins(CraftServer.java:313) [craftbukkit-1.8.jar:git-Bukkit-7019900]
	at net.minecraft.server.v1_8_R1.MinecraftServer.q(MinecraftServer.java:394) [craftbukkit-1.8.jar:git-Bukkit-7019900]
	at net.minecraft.server.v1_8_R1.MinecraftServer.k(MinecraftServer.java:362) [craftbukkit-1.8.jar:git-Bukkit-7019900]
	at net.minecraft.server.v1_8_R1.MinecraftServer.a(MinecraftServer.java:317) [craftbukkit-1.8.jar:git-Bukkit-7019900]
	at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:190) [craftbukkit-1.8.jar:git-Bukkit-7019900]
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:484) [craftbukkit-1.8.jar:git-Bukkit-7019900]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_221]
Caused by: java.lang.ClassNotFoundException: org.bukkit.event.entity.SpawnerSpawnEvent
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:67) ~[craftbukkit-1.8.jar:git-Bukkit-7019900]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[craftbukkit-1.8.jar:git-Bukkit-7019900]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_221]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.8.0_221]
	... 13 more