[17:30:32 ERROR]: Could not load 'plugins/Welcomer.jar' in folder 'plugins'
org.bukkit.plugin.UnknownDependencyException: Vault
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:219) [spigot-1.11.2.jar:git-Spigot-d4f98a3-64277ec]
        at org.bukkit.craftbukkit.v1_11_R1.CraftServer.loadPlugins(CraftServer.java:301) [spigot-1.11.2.jar:git-Spigot-d4f98a3-64277ec]
        at net.minecraft.server.v1_11_R1.DedicatedServer.init(DedicatedServer.java:204) [spigot-1.11.2.jar:git-Spigot-d4f98a3-64277ec]
        at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:544) [spigot-1.11.2.jar:git-Spigot-d4f98a3-64277ec]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_112]