Cannot invoke "com.xxmicloxx.NoteBlockAPI.NoteBlockAPI.doAsync(java.lang.Runnable)" because "this.plugin" is null

[charlie-moomoo]

Full error:

[21:04:12 ERROR]: [ModernPluginLoadingStrategy] Could not load plugin 'MooSussyPlayMusicInCowSaysGamePluginByCowGL-1.0.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NullPointerException: Cannot invoke "com.xxmicloxx.NoteBlockAPI.NoteBlockAPI.doAsync(java.lang.Runnable)" because "this.plugin" is null
	at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:127) ~[purpur-1.20.jar:git-Purpur-1990]
	at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:35) ~[purpur-1.20.jar:git-Purpur-1990]
	at io.papermc.paper.plugin.entrypoint.strategy.modern.ModernPluginLoadingStrategy.loadProviders(ModernPluginLoadingStrategy.java:116) ~[purpur-1.20.jar:git-Purpur-1990]
	at io.papermc.paper.plugin.storage.SimpleProviderStorage.enter(SimpleProviderStorage.java:39) ~[purpur-1.20.jar:git-Purpur-1990]
	at io.papermc.paper.plugin.entrypoint.LaunchEntryPointHandler.enter(LaunchEntryPointHandler.java:36) ~[purpur-1.20.jar:git-Purpur-1990]
	at org.bukkit.craftbukkit.v1_20_R1.CraftServer.loadPlugins(CraftServer.java:445) ~[purpur-1.20.jar:git-Purpur-1990]
	at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:307) ~[purpur-1.20.jar:git-Purpur-1990]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1117) ~[purpur-1.20.jar:git-Purpur-1990]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:323) ~[purpur-1.20.jar:git-Purpur-1990]
	at java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "com.xxmicloxx.NoteBlockAPI.NoteBlockAPI.doAsync(java.lang.Runnable)" because "this.plugin" is null
	at com.xxmicloxx.NoteBlockAPI.songplayer.SongPlayer.start(SongPlayer.java:312) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.SongPlayer.<init>(SongPlayer.java:98) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.SongPlayer.<init>(SongPlayer.java:75) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.SongPlayer.<init>(SongPlayer.java:59) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.RangeSongPlayer.<init>(RangeSongPlayer.java:22) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at com.xxmicloxx.NoteBlockAPI.songplayer.PositionSongPlayer.<init>(PositionSongPlayer.java:25) ~[NoteBlockAPI-1.6.2-SNAPSHOT.jar:?]
	at xyz.cowgl.moosussyplaymusicincowsaysgamepluginbycowgl.MooSussyPlayMusicInCowSaysGamePluginByCowGL.<init>(MooSussyPlayMusicInCowSaysGamePluginByCowGL.java:20) ~[MooSussyPlayMusicInCowSaysGamePluginByCowGL-1.0.jar:?]
	at jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62) ~[?:?]
	at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502) ~[?:?]
	at java.lang.reflect.ReflectAccess.newInstance(ReflectAccess.java:128) ~[?:?]
	at jdk.internal.reflect.ReflectionFactory.newInstance(ReflectionFactory.java:304) ~[?:?]
	at java.lang.Class.newInstance(Class.java:725) ~[?:?]
	at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:88) ~[purpur-api-1.20-R0.1-SNAPSHOT.jar:?]
	at io.papermc.paper.plugin.provider.type.spigot.SpigotPluginProvider.createInstance(SpigotPluginProvider.java:123) ~[purpur-1.20.jar:git-Purpur-1990]
	... 9 more