[14:05:07 ERROR]: Could not pass event PlayerJoinEvent to ItemsAdder v4.0.2-alpha-test-3 java.lang.NoSuchFieldError: Class net.minecraft.world.entity.Entity does not have member field 'net.minecraft.server.level.ChunkMap$TrackedEntity tracker' at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.km.a(SourceFile:147) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.km.b(SourceFile:39) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.jG.c(SourceFile:334) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.iR.a(SourceFile:128) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at com.destroystokyo.paper.event.executor.MethodHandleEventExecutor.execute(MethodHandleEventExecutor.java:40) ~[paper-api-1.21-R0.1-SNAPSHOT.jar:?] at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:84) ~[paper-api-1.21-R0.1-SNAPSHOT.jar:1.21-127-4e6a2a1] at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-api-1.21-R0.1-SNAPSHOT.jar:?] at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.21.jar:1.21-127-4e6a2a1] at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131) ~[paper-1.21.jar:1.21-127-4e6a2a1] at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:628) ~[paper-api-1.21-R0.1-SNAPSHOT.jar:?] at net.minecraft.server.players.PlayerList.placeNewPlayer(PlayerList.java:347) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.network.ServerConfigurationPacketListenerImpl.handleConfigurationFinished(ServerConfigurationPacketListenerImpl.java:173) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.network.protocol.configuration.ServerboundFinishConfigurationPacket.handle(ServerboundFinishConfigurationPacket.java:22) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.network.protocol.configuration.ServerboundFinishConfigurationPacket.handle(ServerboundFinishConfigurationPacket.java:13) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:56) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:151) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1537) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:201) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:125) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1514) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1507) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:135) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:1466) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1473) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1318) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:330) ~[paper-1.21.jar:1.21-127-4e6a2a1] at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?] [14:05:07 INFO]: ray098[/**.**.**.**:34221] logged in with entity id 79 at ([world]-505.2553326018035, 79.0, -685.4951714295977) [14:05:09 WARN]: [ItemsAdder] Task #1522 for ItemsAdder v4.0.2-alpha-test-3 generated an exception java.lang.UnsupportedOperationException: null at java.base/java.util.ImmutableCollections.uoe(ImmutableCollections.java:142) ~[?:?] at java.base/java.util.ImmutableCollections$AbstractImmutableCollection.add(ImmutableCollections.java:147) ~[?:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.kB.a(SourceFile:158) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.kH.a(SourceFile:101) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.ky.a(SourceFile:279) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.iR.a(SourceFile:175) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.iR.aS(SourceFile:169) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.iR.aT(SourceFile:162) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:86) ~[paper-1.21.jar:1.21-127-4e6a2a1] at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:475) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1726) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:473) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1598) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1304) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:330) ~[paper-1.21.jar:1.21-127-4e6a2a1] at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?] [14:05:09 WARN]: [ItemsAdder] Task #1524 for ItemsAdder v4.0.2-alpha-test-3 generated an exception java.lang.UnsupportedOperationException: null at java.base/java.util.ImmutableCollections.uoe(ImmutableCollections.java:142) ~[?:?] at java.base/java.util.ImmutableCollections$AbstractImmutableCollection.add(ImmutableCollections.java:147) ~[?:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.kB.a(SourceFile:158) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.kH.a(SourceFile:101) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.ky.a(SourceFile:279) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.iR.a(SourceFile:175) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.iR.aS(SourceFile:169) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at ItemsAdder_4.0.2-alpha-test-3.jar/ia.m.iR.aT(SourceFile:162) ~[ItemsAdder_4.0.2-alpha-test-3.jar:?] at org.bukkit.craftbukkit.scheduler.CraftTask.run(CraftTask.java:86) ~[paper-1.21.jar:1.21-127-4e6a2a1] at org.bukkit.craftbukkit.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:475) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1726) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:473) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1598) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1304) ~[paper-1.21.jar:1.21-127-4e6a2a1] at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:330) ~[paper-1.21.jar:1.21-127-4e6a2a1] at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]