[ItemsAdder]: Disabling ItemsAdder v3.3.0b-r4

ERROR
23:17:21

Could not pass event PluginDisableEvent to ItemsAdder v3.3.0b-r4

Console
23:17:21

java.lang.NullPointerException: Cannot invoke "dev.lone.LoneLibs.nbt.nbtapi.NBTFile.save()" because "this.a" is null
at ia.m.cx.a(SourceFile:512) ~[ItemsAdder.jar:?]
at com.destroystokyo.paper.event.executor.MethodHandleEventExecutor.execute(MethodHandleEventExecutor.java:40) ~[purpur-api-1.19.3-R0.1-SNAPSHOT.jar:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:76) ~[purpur-api-1.19.3-R0.1-SNAPSHOT.jar:git-Purpur-1876]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[purpur-api-1.19.3-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:680) ~[purpur-api-1.19.3-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.java.JavaPluginLoader.disablePlugin(JavaPluginLoader.java:397) ~[purpur-api-1.19.3-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.SimplePluginManager.disablePlugin(SimplePluginManager.java:587) ~[purpur-api-1.19.3-R0.1-SNAPSHOT.jar:?]
at org.bukkit.plugin.SimplePluginManager.disablePlugins(SimplePluginManager.java:564) ~[purpur-api-1.19.3-R0.1-SNAPSHOT.jar:?]
at org.bukkit.craftbukkit.v1_19_R2.CraftServer.disablePlugins(CraftServer.java:558) ~[purpur-1.19.3.jar:git-Purpur-1876]
at net.minecraft.server.MinecraftServer.stopServer(MinecraftServer.java:957) ~[purpur-1.19.3.jar:git-Purpur-1876]
at net.minecraft.server.dedicated.DedicatedServer.stopServer(DedicatedServer.java:839) ~[purpur-1.19.3.jar:git-Purpur-1876]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1239) ~[purpur-1.19.3.jar:git-Purpur-1876]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:321) ~[purpur-1.19.3.jar:git-Purpur-1876]
at java.lang.Thread.run(Thread.java:833) ~[?:?]

INFO
23:17:21

[ItemsAdder]: [Host] Stopped self-host webserver on port: 8164