org.bukkit.plugin.UnknownDependencyException: NPCLib
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:219) [spigot.jar:git-Spigot-21fe707-741a1bd]
at org.bukkit.craftbukkit.v1_8_R3.CraftServer.loadPlugins(CraftServer.java:292) [spigot.jar:git-Spigot-21fe707-741a1bd]
at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:198) [spigot.jar:git-Spigot-21fe707-741a1bd]
at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [spigot.jar:git-Spigot-21fe707-741a1bd]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_311]```
When I try the start the plugin comes this error: