Error message for Simple Voice Chat (voicechat-bukkit-1.18.1-2.2.1)

gistfile1.txt

[17:37:42] [Server thread/INFO]: [voicechat] Disabling voicechat v1.18.1-2.2.1
[17:37:42] [Server thread/ERROR]: Error occurred while disabling voicechat v1.18.1-2.2.1 (Is it up to date?)
java.lang.NullPointerException: Cannot invoke "Object.equals(Object)" because the return value of "org.bukkit.plugin.RegisteredServiceProvider.getProvider()" is null
	at org.bukkit.plugin.SimpleServicesManager.unregister(SimpleServicesManager.java:175) ~[paper-api-1.18.1-R0.1-SNAPSHOT.jar:?]
	at de.maxhenkel.voicechat.Voicechat.onDisable(Voicechat.java:130) ~[voicechat-bukkit-1.18.1-2.2.1.jar:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:266) ~[paper-api-1.18.1-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:399) ~[paper-api-1.18.1-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:537) ~[paper-api-1.18.1-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:514) ~[paper-api-1.18.1-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.craftbukkit.v1_18_R1.CraftServer.disablePlugins(CraftServer.java:498) ~[paper-1.18.1.jar:git-Paper-133]
	at net.minecraft.server.MinecraftServer.stopServer(MinecraftServer.java:1036) ~[paper-1.18.1.jar:git-Paper-133]
	at net.minecraft.server.dedicated.DedicatedServer.stopServer(DedicatedServer.java:800) ~[paper-1.18.1.jar:git-Paper-133]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1315) ~[paper-1.18.1.jar:git-Paper-133]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:317) ~[paper-1.18.1.jar:git-Paper-133]
	at java.lang.Thread.run(Thread.java:833) ~[?:?]