[16:38:44 WARN]: [com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.PacketEventsAPI] PacketEvents caught an unhandled exception while calling your listener.
java.lang.IndexOutOfBoundsException: readerIndex(14347) + length(1) exceeds writerIndex(14347): PooledUnsafeDirectByteBuf(ridx: 14347, widx: 14347, cap: 16384)
at io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1442) ~[netty-buffer-4.1.82.Final.jar:4.1.82.Final]
at io.netty.buffer.AbstractByteBuf.readByte(AbstractByteBuf.java:730) ~[netty-buffer-4.1.82.Final.jar:4.1.82.Final]
at com.github.kaspiandev.antipopup.libs.io.github.retrooper.packetevents.netty.buffer.ByteBufOperatorModernImpl.readByte(ByteBufOperatorModernImpl.java:74) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.netty.buffer.ByteBufHelper.readByte(ByteBufHelper.java:67) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.wrapper.PacketWrapper.readByte(PacketWrapper.java:222) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.wrapper.PacketWrapper.readBoolean(PacketWrapper.java:234) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerServerData.read(WrapperPlayServerServerData.java:58) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.wrapper.PacketWrapper.readEvent(PacketWrapper.java:179) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.wrapper.PacketWrapper.(PacketWrapper.java:124) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.wrapper.PacketWrapper.(PacketWrapper.java:114) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.wrapper.play.server.WrapperPlayServerServerData.(WrapperPlayServerServerData.java:37) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.listeners.PacketEventsListener.onPacketSend(PacketEventsListener.java:32) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.event.PacketSendEvent.call(PacketSendEvent.java:48) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.event.EventManager.callEvent(EventManager.java:51) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.com.github.retrooper.packetevents.util.PacketEventsImplHelper.handleClientBoundPacket(PacketEventsImplHelper.java:43) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.io.github.retrooper.packetevents.injector.handlers.PacketEventsEncoder.encode(PacketEventsEncoder.java:57) ~[AntiPopup-5.1.jar:?]
at com.github.kaspiandev.antipopup.libs.io.github.retrooper.packetevents.injector.handlers.PacketEventsEncoder.encode(PacketEventsEncoder.java:41) ~[AntiPopup-5.1.jar:?]
at io.netty.handler.codec.MessageToMessageEncoder.write(MessageToMessageEncoder.java:90) ~[netty-codec-4.1.82.Final.jar:4.1.82.Final]
at com.github.kaspiandev.antipopup.libs.io.github.retrooper.packetevents.injector.handlers.PacketEventsEncoder.write(PacketEventsEncoder.java:77) ~[AntiPopup-5.1.jar:?]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:113) ~[netty-codec-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:120) ~[netty-codec-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:764) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:790) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:758) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:1020) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:311) ~[netty-transport-4.1.82.Final.jar:4.1.82.Final]
at com.comphenix.protocol.injector.netty.channel.NettyChannelProxy.writeAndFlush(NettyChannelProxy.java:227) ~[ProtocolLib.jar:?]
at com.comphenix.protocol.injector.netty.channel.NettyChannelProxy.writeAndFlush(NettyChannelProxy.java:233) ~[ProtocolLib.jar:?]
at net.minecraft.network.Connection.doSendPacket(Connection.java:459) ~[?:?]
at net.minecraft.network.Connection.lambda$sendPacket$11(Connection.java:433) ~[?:?]
at com.comphenix.protocol.injector.netty.channel.NettyEventLoopProxy.lambda$proxyRunnable$2(NettyEventLoopProxy.java:48) ~[ProtocolLib.jar:?]
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174) ~[netty-common-4.1.82.Final.jar:4.1.82.Final]
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167) ~[netty-common-4.1.82.Final.jar:4.1.82.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470) ~[netty-common-4.1.82.Final.jar:4.1.82.Final]
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:406) ~[netty-transport-classes-epoll-4.1.82.Final.jar:4.1.82.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.82.Final.jar:4.1.82.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.82.Final.jar:4.1.82.Final]
at java.lang.Thread.run(Thread.java:833) ~[?:?]

AntiPopup doesn't support 1.19.3 yet.