[02:38:12] [Server thread/FATAL]: Error executing task on Server
 java.lang.NullPointerException: null cannot be cast to non-null type com.pixelmonmod.pixelmon.entities.pixelmon.PixelmonEntity
        at com.cable.ultimapixelmon.listener.BattleListener.on$lambda-3(BattleListener.kt:91) ~[ultimapixelmon:?]
        at com.pixelmonmod.pixelmon.comm.packetHandlers.battles.BattleGuiClosedPacket.handlePacket(BattleGuiClosedPacket.java:39) ~[pixelmon:1.16.5-9.1.0]
        at com.pixelmonmod.pixelmon.comm.data.AbstractPixelmonPacket.lambda$handle$0(AbstractPixelmonPacket.java:49) ~[pixelmon:1.16.5-9.1.0]
        at net.minecraftforge.fml.network.NetworkEvent$Context.enqueueWork(NetworkEvent.java:215) ~[forge:?]
        at com.pixelmonmod.pixelmon.comm.data.AbstractPixelmonPacket.handle(AbstractPixelmonPacket.java:48) ~[pixelmon:1.16.5-9.1.0]
        at com.pixelmonmod.pixelmon.comm.PacketRegistry.handle(PacketRegistry.java:486) ~[pixelmon:1.16.5-9.1.0]
        at com.pixelmonmod.pixelmon.network.IndexedMessageCodec.lambda$tryDecode$3(IndexedMessageCodec.java:128) ~[pixelmon:1.16.5-9.1.0]
        at java.util.Optional.ifPresent(Optional.java:183) ~[?:?]
        at com.pixelmonmod.pixelmon.network.IndexedMessageCodec.tryDecode(IndexedMessageCodec.java:128) ~[pixelmon:1.16.5-9.1.0]
        at com.pixelmonmod.pixelmon.network.IndexedMessageCodec.consume(IndexedMessageCodec.java:162) ~[pixelmon:1.16.5-9.1.0]
        at com.pixelmonmod.pixelmon.network.SimpleChannel.networkEventListener(SimpleChannel.java:78) ~[pixelmon:1.16.5-9.1.0]
        at net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:247) ~[server.jar:?]
        at net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:239) ~[server.jar:?]
        at net.minecraftforge.eventbus.EventBus.post(EventBus.java:303) ~[server.jar:?]
        at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) ~[server.jar:?]
        at net.minecraftforge.fml.network.NetworkInstance.dispatch(NetworkInstance.java:86) ~[forge:?]
        at net.minecraftforge.fml.network.NetworkHooks.lambda$onCustomPayload$1(NetworkHooks.java:91) ~[forge:?]
        at java.util.Optional.map(Optional.java:265) ~[?:?]
        at net.minecraftforge.fml.network.NetworkHooks.onCustomPayload(NetworkHooks.java:91) ~[forge:?]
        at net.minecraft.network.play.ServerPlayNetHandler.func_147349_a(ServerPlayNetHandler.java:2571) ~[?:?]
        at net.minecraft.network.play.client.CCustomPayloadPacket.func_148833_a(CCustomPayloadPacket.java:50) ~[?:?]
        at net.minecraft.network.play.client.CCustomPayloadPacket.func_148833_a(CCustomPayloadPacket.java:13) ~[?:?]
        at net.minecraft.network.PacketThreadUtil.func_225383_a(PacketThreadUtil.java:22) ~[?:?]
        at net.minecraft.util.concurrent.TickDelayedTask.run(SourceFile:18) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213166_h(SourceFile:144) ~[?:?]
        at net.minecraft.util.concurrent.RecursiveEventLoop.func_213166_h(SourceFile:23) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:886) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213166_h(MinecraftServer.java:169) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213168_p(SourceFile:118) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213205_aW(MinecraftServer.java:869) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213168_p(MinecraftServer.java:863) ~[?:?]
        at net.minecraft.util.concurrent.ThreadTaskExecutor.func_213161_c(SourceFile:127) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_213202_o(MinecraftServer.java:849) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:781) ~[?:?]
        at net.minecraft.server.MinecraftServer.func_240783_a_(MinecraftServer.java:265) ~[?:?]
        at java.lang.Thread.run(Thread.java:829) [?:?]