[18:37:50] [Server thread/ERROR]: Error occurred while enabling Umbaska vBETA_1.5.05 (Is it up to date?)
java.lang.NoClassDefFoundError: org/bukkit/event/player/PlayerInteractAtEntityEvent
	at uk.co.umbaska.Managers.Register.registerAll(Register.java:33) ~[?:?]
	at uk.co.umbaska.Main.onEnable(Main.java:74) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:316) ~[permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:332) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:412) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at org.bukkit.craftbukkit.v1_7_R4.CraftServer.loadPlugin(CraftServer.java:476) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at org.bukkit.craftbukkit.v1_7_R4.CraftServer.enablePlugins(CraftServer.java:394) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.MinecraftServer.n(MinecraftServer.java:360) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.MinecraftServer.g(MinecraftServer.java:334) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.MinecraftServer.a(MinecraftServer.java:290) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.DedicatedServer.init(DedicatedServer.java:210) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:458) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
Caused by: java.lang.ClassNotFoundException: org.bukkit.event.player.PlayerInteractAtEntityEvent
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]
	... 13 more
[18:37:50] [Server thread/INFO]: Server permissions file permissions.yml is empty, ignoring it
[18:37:50] [Server thread/INFO]: Done (6.294s)! For help, type "help" or "?"
[18:37:50] [Server thread/INFO]: Starting remote control listener
[18:37:50] [Server thread/WARN]: No rcon password set in '/home/minecraft/multicraft/servers/server1265/server.properties', rcon disabled!
[18:37:50] [Craft Scheduler Thread - 0/INFO]: [Skript] Checking for the latest version of Skript...
[18:37:51] [Server thread/INFO]: [Skript] All scripts loaded without errors.
[18:37:51] [Server thread/WARN]: [Skript] Task #5 for Skript v2.1.2 generated an exception
java.lang.NoClassDefFoundError: net/minecraft/server/v1_8_R1/IAttribute
	at java.lang.Class.getDeclaredMethods0(Native Method) ~[?:1.7.0_51]
	at java.lang.Class.privateGetDeclaredMethods(Unknown Source) ~[?:1.7.0_51]
	at java.lang.Class.getMethod0(Unknown Source) ~[?:1.7.0_51]
	at java.lang.Class.getMethod(Unknown Source) ~[?:1.7.0_51]
	at java.lang.Class.getEnumConstantsShared(Unknown Source) ~[?:1.7.0_51]
	at java.lang.Class.enumConstantDirectory(Unknown Source) ~[?:1.7.0_51]
	at java.lang.Enum.valueOf(Unknown Source) ~[?:1.7.0_51]
	at uk.co.umbaska.Utils.EnumClassInfo$1.parse(EnumClassInfo.java:70) ~[?:?]
	at uk.co.umbaska.Utils.EnumClassInfo$1.parse(EnumClassInfo.java:1) ~[?:?]
	at ch.njol.skript.registrations.Classes.parseSimple(Classes.java:398) ~[?:?]
	at ch.njol.skript.registrations.Classes.parse(Classes.java:427) ~[?:?]
	at ch.njol.skript.lang.UnparsedLiteral.getConvertedExpression(UnparsedLiteral.java:97) ~[?:?]
	at ch.njol.skript.lang.UnparsedLiteral.getConvertedExpression(UnparsedLiteral.java:86) ~[?:?]
	at ch.njol.skript.lang.UnparsedLiteral.getConvertedExpression(UnparsedLiteral.java:1) ~[?:?]
	at ch.njol.skript.conditions.CondCompare.init(CondCompare.java:174) ~[?:?]
	at ch.njol.skript.conditions.CondCompare.init(CondCompare.java:126) ~[?:?]
	at ch.njol.skript.lang.SkriptParser.parse(SkriptParser.java:237) ~[?:?]
	at ch.njol.skript.lang.SkriptParser.parse(SkriptParser.java:164) ~[?:?]
	at ch.njol.skript.lang.Statement.parse(Statement.java:42) ~[?:?]
	at ch.njol.skript.ScriptLoader.loadItems(ScriptLoader.java:615) ~[?:?]
	at ch.njol.skript.ScriptLoader.loadScript(ScriptLoader.java:489) ~[?:?]
	at ch.njol.skript.ScriptLoader.loadScripts(ScriptLoader.java:239) ~[?:?]
	at ch.njol.skript.ScriptLoader.loadScripts(ScriptLoader.java:193) ~[?:?]
	at ch.njol.skript.Skript$2.run(Skript.java:378) ~[?:?]
	at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftTask.run(CraftTask.java:71) ~[permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at org.bukkit.craftbukkit.v1_7_R4.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:350) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.MinecraftServer.v(MinecraftServer.java:641) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.DedicatedServer.v(DedicatedServer.java:289) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.MinecraftServer.u(MinecraftServer.java:584) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.MinecraftServer.run(MinecraftServer.java:490) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at net.minecraft.server.v1_7_R4.ThreadServerApplication.run(SourceFile:628) [permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
Caused by: java.lang.ClassNotFoundException: net.minecraft.server.v1_8_R1.IAttribute
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:91) ~[permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:86) ~[permgen.jar:git-Spigot-1.7.9-R0.2-208-ge0f2e95]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_51]
	... 31 more