Unknown error

[mwmo2911]

Can somebody please help me resolve the below issue. I checked both FastLogin and ProtocolLib configs and it looks fine. I'm just lost with that error, what triggers that?
[00:19:24 ERROR]: [FastLogin] Unhandled exception occurred in onAsyncPacket() for FastLogin com.comphenix.protocol.reflect.FieldAccessException: Field index 0 is out of bounds for length 0 at com.comphenix.protocol.reflect.FieldAccessException.fromFormat(FieldAccessException.java:49) ~[ProtocolLib.jar:?] at com.comphenix.protocol.reflect.StructureModifier.read(StructureModifier.java:245) ~[ProtocolLib.jar:?] at com.github.games647.fastlogin.bukkit.listener.protocollib.ProtocolLibListener.onLogin(ProtocolLibListener.java:76) ~[FastLogin.jar:?] at com.github.games647.fastlogin.bukkit.listener.protocollib.ProtocolLibListener.onPacketReceiving(ProtocolLibListener.java:52) ~[FastLogin.jar:?] at com.comphenix.protocol.async.AsyncListenerHandler.processPacket(AsyncListenerHandler.java:622) ~[ProtocolLib.jar:?] at com.comphenix.protocol.async.AsyncListenerHandler.listenerLoop(AsyncListenerHandler.java:576) ~[ProtocolLib.jar:?] at com.comphenix.protocol.async.AsyncListenerHandler.access$100(AsyncListenerHandler.java:49) ~[ProtocolLib.jar:?] at com.comphenix.protocol.async.AsyncListenerHandler$1.run(AsyncListenerHandler.java:221) ~[ProtocolLib.jar:?] at com.comphenix.protocol.async.AsyncListenerHandler.lambda$start$1(AsyncListenerHandler.java:290) ~[ProtocolLib.jar:?] at org.bukkit.craftbukkit.v1_20_R2.scheduler.CraftTask.run(CraftTask.java:101) ~[purpur-1.20.2.jar:git-Purpur-2095] at org.bukkit.craftbukkit.v1_20_R2.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:57) ~[purpur-1.20.2.jar:git-Purpur-2095] at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[purpur-1.20.2.jar:?] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[?:?] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[?:?] at java.lang.Thread.run(Thread.java:1583) ~[?:?]

[TuxCoding]

This is a bug report, so please fill out the template from here:

https://github.com/games647/FastLogin/issues/new?assignees=&labels=bug&projects=&template=bug_report.yaml

Essential details are missing in order to help you.