random error spams on console (im using 1.21.3)

[shpellar]

java.io.NotSerializableException: org.bukkit.craftbukkit.attribute.CraftAttribute
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1200)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:358)
[03:06:47 WARN]: at java.base/java.util.ArrayList.writeObject(ArrayList.java:948)
[03:06:47 WARN]: at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
[03:06:47 WARN]: at java.base/java.lang.reflect.Method.invoke(Method.java:580)
[03:06:47 WARN]: at java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1072)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1529)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1451)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1194)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:358)
[03:06:47 WARN]: at java.base/java.util.ArrayList.writeObject(ArrayList.java:948)
[03:06:47 WARN]: at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
[03:06:47 WARN]: at java.base/java.lang.reflect.Method.invoke(Method.java:580)
[03:06:47 WARN]: at java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1072)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1529)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1451)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1194)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:358)
[03:06:47 WARN]: at java.base/java.util.ArrayList.writeObject(ArrayList.java:948)
[03:06:47 WARN]: at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
[03:06:47 WARN]: at java.base/java.lang.reflect.Method.invoke(Method.java:580)
[03:06:47 WARN]: at java.base/java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1072)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1529)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1451)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1194)
[03:06:47 WARN]: at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:358)
[03:06:47 WARN]: at CoreProtect-CE-23.0-RC1b.jar//net.coreprotect.database.statement.EntityStatement.insert(EntityStatement.java:28)
[03:06:47 WARN]: at CoreProtect-CE-23.0-RC1b.jar//net.coreprotect.database.logger.EntityKillLogger.log(EntityKillLogger.java:50)
[03:06:47 WARN]: at CoreProtect-CE-23.0-RC1b.jar//net.coreprotect.consumer.process.EntityKillProcess.process(EntityKillProcess.java:24)
[03:06:47 WARN]: at CoreProtect-CE-23.0-RC1b.jar//net.coreprotect.consumer.process.Process.processConsumer(Process.java:206)
[03:06:47 WARN]: at CoreProtect-CE-23.0-RC1b.jar//net.coreprotect.consumer.Consumer.run(Consumer.java:133)
[03:06:47 WARN]: at java.base/java.lang.Thread.run(Thread.java:1583)
[03:06:47 WARN]: java.lang.NullPointerException: Cannot invoke "java.sql.ResultSet.next()" because "resultSet" is null
[03:06:47 WARN]: at CoreProtect-CE-23.0-RC1b.jar//net.coreprotect.database.logger.EntityKillLogger.log(EntityKillLogger.java:52)
[03:06:47 WARN]: at CoreProtect-CE-23.0-RC1b.jar//net.coreprotect.consumer.process.EntityKillProcess.process(EntityKillProcess.java:24)
[03:06:47 WARN]: at CoreProtect-CE-23.0-RC1b.jar//net.coreprotect.consumer.process.Process.processConsumer(Process.java:206)
[03:06:47 WARN]: at CoreProtect-CE-23.0-RC1b.jar//net.coreprotect.consumer.Consumer.run(Consumer.java:133)
[03:06:47 WARN]: at java.base/java.lang.Thread.run(Thread.java:1583)

[quintindunn]

Getting the same error 1.21.4
Version: 22.4

[quintindunn]

Haven't got the energy to compile the plugin myself to test it, but just saw commit b3db65d. Sounds like it fixes it, I don't believe there's any releases since that commit so good chance that the new version just needs to be released.

Also I have very little experience with Minecraft modding/plugins nor do I know the structure of this project at all so I have no clue if it's even related.