[00:49:37] [Server thread/INFO]: [PearlClutching] Enabling PearlClutching v1.0*
[00:49:37] [Server thread/INFO]: [PearlClutching] Registering event listeners
[00:49:37] [Server thread/INFO]: [PearlClutching] Find 1 PlayerActionBar instances, start managing them
[00:49:37] [Server thread/INFO]: Running delayed init tasks
[00:49:37] [Server thread/INFO]: Done (2.570s)! For help, type "help"
[00:49:37] [Server thread/INFO]: Timings Reset
[00:49:42] [User Authenticator #0/INFO]: UUID of player kevin4515 is ece2244f-decc-4916-a151-5eb95a22dcbe
[00:49:42] [Server thread/ERROR]: Could not pass event PlayerJoinEvent to PearlClutching v1.0
java.util.ConcurrentModificationException: null
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1597) ~[?:?]
at java.util.HashMap$KeyIterator.next(HashMap.java:1620) ~[?:?]
at io.github.pixerena.firework.reactive.DefaultSignal.set(DefaultSignal.java:41) ~[PearlClutching-1.0-SNAPSHOT.jar:?]
at io.github.pixerena.PlayerData.setPlayer(PlayerData.java:17) ~[PearlClutching-1.0-SNAPSHOT.jar:?]
at io.github.pixerena.PlayerJoinEventListener.onPlayerJoin(PlayerJoinEventListener.java:25) ~[PearlClutching-1.0-SNAPSHOT.jar:?]
at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor1.execute(Unknown Source) ~[?:?]
at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:81) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:git-Paper-102]
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.20.1.jar:git-Paper-102]
at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126) ~[paper-1.20.1.jar:git-Paper-102]
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:615) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]
at net.minecraft.server.players.PlayerList.placeNewPlayer(PlayerList.java:339) ~[paper-1.20.1.jar:git-Paper-102]
at net.minecraft.server.network.ServerLoginPacketListenerImpl.placeNewPlayer(ServerLoginPacketListenerImpl.java:202) ~[?:?]
at net.minecraft.server.network.ServerLoginPacketListenerImpl.handleAcceptedLogin(ServerLoginPacketListenerImpl.java:183) ~[?:?]
at net.minecraft.server.network.ServerLoginPacketListenerImpl.tick(ServerLoginPacketListenerImpl.java:85) ~[?:?]
at net.minecraft.network.Connection.tick(Connection.java:602) ~[?:?]
at net.minecraft.server.network.ServerConnectionListener.tick(ServerConnectionListener.java:234) ~[?:?]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1587) ~[paper-1.20.1.jar:git-Paper-102]
at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:447) ~[paper-1.20.1.jar:git-Paper-102]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1394) ~[paper-1.20.1.jar:git-Paper-102]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1171) ~[paper-1.20.1.jar:git-Paper-102]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:318) ~[paper-1.20.1.jar:git-Paper-102]
at java.lang.Thread.run(Thread.java:833) ~[?:?]