when i close the server with /stop and this error msg is showing up

[CayanNet]

[io.netty.util.concurrent.DefaultPromise] An exception was thrown by org.geysermc.floodgate.addon.AddonManagerAddon$$Lambda$11944/0x00007efda979fc30.operationComplete() java.lang.NoClassDefFoundError: org/geysermc/floodgate/shadow/com/google/common/cache/LocalCache$StrongWriteEntry at org.geysermc.floodgate.shadow.com.google.common.cache.LocalCache$EntryFactory$3.newEntry(LocalCache.java:470) ~[floodgate-spigot.jar:?] at org.geysermc.floodgate.shadow.com.google.common.cache.LocalCache$Segment.newEntry(LocalCache.java:1984) ~[floodgate-spigot.jar:?] at org.geysermc.floodgate.shadow.com.google.common.cache.LocalCache$Segment.put(LocalCache.java:2835) ~[floodgate-spigot.jar:?] at org.geysermc.floodgate.shadow.com.google.common.cache.LocalCache.put(LocalCache.java:4196) ~[floodgate-spigot.jar:?] at org.geysermc.floodgate.shadow.com.google.common.cache.LocalCache$LocalManualCache.put(LocalCache.java:4880) ~[floodgate-spigot.jar:?] at org.geysermc.floodgate.api.SimpleFloodgateApi.setPendingRemove(SimpleFloodgateApi.java:198) ~[floodgate-spigot.jar:?] at org.geysermc.floodgate.addon.data.SpigotDataAddon.onChannelClosed(SpigotDataAddon.java:69) ~[floodgate-spigot.jar:?] at org.geysermc.floodgate.inject.CommonPlatformInjector.channelClosedCall(CommonPlatformInjector.java:91) ~[floodgate-spigot.jar:?] at org.geysermc.floodgate.addon.AddonManagerAddon.lambda$onInject$0(AddonManagerAddon.java:39) ~[floodgate-spigot.jar:?] at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:590) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:583) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:559) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:492) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:636) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:625) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:105) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.DefaultChannelPromise.trySuccess(DefaultChannelPromise.java:84) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannel$CloseFuture.setClosed(AbstractChannel.java:1164) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannel$AbstractUnsafe.doClose0(AbstractChannel.java:755) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:731) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:620) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.DefaultChannelPipeline$HeadContext.close(DefaultChannelPipeline.java:1352) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeClose(AbstractChannelHandlerContext.java:749) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannelHandlerContext.close(AbstractChannelHandlerContext.java:727) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.handler.flush.FlushConsolidationHandler.close(FlushConsolidationHandler.java:173) ~[netty-handler-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannelHandlerContext.invokeClose(AbstractChannelHandlerContext.java:751) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannelHandlerContext.close(AbstractChannelHandlerContext.java:727) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannelHandlerContext.close(AbstractChannelHandlerContext.java:560) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.DefaultChannelPipeline.close(DefaultChannelPipeline.java:957) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.AbstractChannel.close(AbstractChannel.java:244) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at net.minecraft.network.Connection.disconnect(Connection.java:652) ~[?:?] at net.minecraft.server.network.ServerCommonPacketListenerImpl.lambda$disconnect$2(ServerCommonPacketListenerImpl.java:368) ~[purpur-1.20.4.jar:git-Purpur-2165] at net.minecraft.network.PacketSendListener$1.onSuccess(PacketSendListener.java:12) ~[purpur-1.20.4.jar:git-Purpur-2165] at net.minecraft.network.Connection.lambda$doSendPacket$11(Connection.java:453) ~[?:?] at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:590) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:557) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:492) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.DefaultPromise.addListener(DefaultPromise.java:185) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.DefaultChannelPromise.addListener(DefaultChannelPromise.java:95) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.DefaultChannelPromise.addListener(DefaultChannelPromise.java:30) ~[netty-transport-4.1.97.Final.jar:4.1.97.Final] at net.minecraft.network.Connection.doSendPacket(Connection.java:451) ~[?:?] at net.minecraft.network.Connection.lambda$sendPacket$10(Connection.java:433) ~[?:?] at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:413) ~[netty-transport-classes-epoll-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.97.Final.jar:4.1.97.Final] at java.lang.Thread.run(Thread.java:840) ~[?:?] Caused by: java.lang.ClassNotFoundException: org.geysermc.floodgate.shadow.com.google.common.cache.LocalCache$StrongWriteEntry at org.bukkit.plugin.java.PluginClassLoader.loadClass0(PluginClassLoader.java:199) ~[purpur-api-1.20.4-R0.1-SNAPSHOT.jar:?] at org.bukkit.plugin.java.PluginClassLoader.loadClass(PluginClassLoader.java:166) ~[purpur-api-1.20.4-R0.1-SNAPSHOT.jar:?] at java.lang.ClassLoader.loadClass(ClassLoader.java:525) ~[?:?] ... 49 more latest.log lobby log