java.lang.ClassCastException: class java.lang.Integer cannot be cast to class java.util.List (java.lang.Integer and java.util.List are in module java.base of loader 'bootstrap')
at MBedwars-5.2.5.jar//de.marcely.bedwars.jt.a(OutEntityMetadataPacketReader.java:31)
at MBedwars-5.2.5.jar//de.marcely.bedwars.jn.write(BukkitInjector.java:140)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:879)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:863)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:968)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:856)
at io.netty.channel.ChannelDuplexHandler.write(ChannelDuplexHandler.java:115)
at TAB v3.3.2.jar//me.neznamy.tab.shared.features.injection.NettyPipelineInjector$TabChannelDuplexHandler.write(NettyPipelineInjector.java:145)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:879)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:863)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:968)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:856)
at io.netty.channel.ChannelDuplexHandler.write(ChannelDuplexHandler.java:115)
at OldCombatMechanics-1.12.1.jar//kernitus.plugin.OldCombatMechanics.utilities.packet.mitm.PacketInjector.write(PacketInjector.java:196)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:879)
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:863)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:968)
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:856)
at io.netty.channel.DefaultChannelPipeline.write(DefaultChannelPipeline.java:1015)
at io.netty.channel.AbstractChannel.write(AbstractChannel.java:301)
at ProtocolLib.jar//com.comphenix.protocol.injector.netty.channel.NettyChannelProxy.write(NettyChannelProxy.java:210)
at ProtocolLib.jar//com.comphenix.protocol.injector.netty.channel.NettyChannelProxy.write(NettyChannelProxy.java:199)
at net.minecraft.network.NetworkManager.doSendPacket(NetworkManager.java:469)
at net.minecraft.network.NetworkManager.lambda$sendPacket$10(NetworkManager.java:438)
at ProtocolLib.jar//com.comphenix.protocol.injector.netty.channel.NettyEventLoopProxy.lambda$proxyRunnable$2(NettyEventLoopProxy.java:48)
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
00:16:49
at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:174)
at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:167)
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:403)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at java.base/java.lang.Thread.run(Thread.java:1589)