[13:52:28] [Server thread/ERROR]: Error occurred while enabling NPCPlugin v1.0 (Is it up to date?)
org.bukkit.plugin.IllegalPluginAccessException: java.lang.NullPointerException
        at org.bukkit.plugin.SimplePluginManager.getEventListeners(SimplePluginManager.java:663) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at org.bukkit.plugin.SimplePluginManager.registerEvents(SimplePluginManager.java:616) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at net.wardensmp.plugins.dev.npc.NPCPlugin.onEnable(NPCPlugin.java:17) ~[?:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:342) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:480) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServer.java:492) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServer.java:406) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at net.minecraft.server.v1_16_R3.MinecraftServer.loadWorld(MinecraftServer.java:554) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:257) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:928) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$0(MinecraftServer.java:273) ~[spigot-1.16.5.jar:3096-Spigot-9fb885e-296df56]
        at java.lang.Thread.run(Thread.java:829) [?:?]