org.bukkit.plugin.InvalidDescriptionException: commands are of wrong type
        at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile.java:946) ~[spigot.jar:git-Spigot-550ebac-7019900]
        at org.bukkit.plugin.PluginDescriptionFile.<init>(PluginDescriptionFile.java:232) ~[spigot.jar:git-Spigot-550ebac-7019900]
        at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:159) ~[spigot.jar:git-Spigot-550ebac-7019900]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:133) [spigot.jar:git-Spigot-550ebac-7019900]
        at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugins(CraftServer.java:291) [spigot.jar:git-Spigot-550ebac-7019900]
        at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:152) [spigot.jar:git-Spigot-550ebac-7019900]
        at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:505) [spigot.jar:git-Spigot-550ebac-7019900]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_131]
Caused by: java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.util.Map
        at org.bukkit.plugin.PluginDescriptionFile.loadMap(PluginDescriptionFile.java:928) ~[spigot.jar:git-Spigot-550ebac-7019900]
        ... 7 more