Cannot launch Mythic mobs

so just downloaded the mythic mobs and I cant lauch it this is the what it said in the consle:
[18:35:53] [Server thread/ERROR]: Could not load 'plugins/MythicMobs-2.5.1.jar' in folder 'plugins'
org.bukkit.plugin.UnknownDependencyException: MythicLib
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:219) [spigotmc-1.8.8-R0.1.jar:git-Spigot-e4d4710-e1ebe52]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:292)...

Cannot launch Mythic mobs