GUI Error

[Server thread/FATAL] [minecraft/ThreadTaskExecutor]: Error executing task on Server
java.lang.NullPointerException: null
   at net.mcreator.onepiecenewworld.OnepiecenewworldModVariables$PlayerVariablesStorage.readNBT(OnepiecenewworldModVariables.java:380) ~[main/:?] {re:classloading}
   at net.mcreator.onepiecenewworld.OnepiecenewworldModVariables$PlayerVariablesSyncMessage.<init>(OnepiecenewworldModVariables.java:1321) ~[main/:?] {re:classloading}
   at net.minecraftforge.fml.network.simple.IndexedMessageCodec.lambda$tryDecode$0(IndexedMessageCodec.java:120) ~[forge-1.16.5-36.2.26_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
   at java.util.Optional.map(Optional.java:215) ~[?:1.8.0_345] {}
   at net.minecraftforge.fml.network.simple.IndexedMessageCodec.tryDecode(IndexedMessageCodec.java:120) ~[forge-1.16.5-36.2.26_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
   at net.minecraftforge.fml.network.simple.IndexedMessageCodec.consume(IndexedMessageCodec.java:162) ~[forge-1.16.5-36.2.26_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
   at net.minecraftforge.fml.network.simple.SimpleChannel.networkEventListener(SimpleChannel.java:80) ~[forge-1.16.5-36.2.26_mapped_snapshot_20201028-1.16.3-recomp.jar:?] {re:classloading}
   at net.minecraftforge.eventbus.EventBus.doCastFilter(EventBus.java:247) ~[eventbus-4.0.0.jar:?] {}
   at net.minecraftforge.eventbus.EventBus.lambda$addListener$11(EventBus.java:239) ~[eventbus-4.0.0.jar:?] {}
   at net.minecraftforge.eventbus.EventBus.post(EventBus.java:302) ~[eventbus-4.0.0.jar:?] {}
   at net.minecraftforge.eventbus.EventBus.post(EventBus.java:283) ~[eventbus-4.0.0.jar:?] {}
   at net.minecraftforge.fml.network.NetworkInstance.dispatch(NetworkInstance.java:86) ~[forge:?] {re:classloading}
   at net.minecraftforge.fml.network.NetworkHooks.lambda$onCustomPayload$1(NetworkHooks.java:91) ~[forge:?] {re:classloading}
   at java.util.Optional.map(Optional.java:215) ~[?:1.8.0_345] {}
   at net.minecraftforge.fml.network.NetworkHooks.onCustomPayload(NetworkHooks.java:91) ~[forge:?] {re:classloading}
   at net.minecraft.network.play.ServerPlayNetHandler.processCustomPayload(ServerPlayNetHandler.java:1500) ~[forge:?] {re:classloading}
   at net.minecraft.network.play.client.CCustomPayloadPacket.processPacket(CCustomPayloadPacket.java:51) ~[forge:?] {re:classloading}
   at net.minecraft.network.play.client.CCustomPayloadPacket.processPacket(CCustomPayloadPacket.java:12) ~[forge:?] {re:classloading}
   at net.minecraft.network.PacketThreadUtil.lambda$checkThreadAndEnqueue$0(PacketThreadUtil.java:19) ~[forge:?] {re:classloading}
   at net.minecraft.util.concurrent.TickDelayedTask.run(TickDelayedTask.java:20) ~[forge:?] {re:classloading}
   at net.minecraft.util.concurrent.ThreadTaskExecutor.run(ThreadTaskExecutor.java:139) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at net.minecraft.util.concurrent.RecursiveEventLoop.run(RecursiveEventLoop.java:22) ~[forge:?] {re:classloading}
   at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:759) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:159) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at net.minecraft.util.concurrent.ThreadTaskExecutor.driveOne(ThreadTaskExecutor.java:109) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at net.minecraft.server.MinecraftServer.driveOneInternal(MinecraftServer.java:742) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at net.minecraft.server.MinecraftServer.driveOne(MinecraftServer.java:736) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at net.minecraft.util.concurrent.ThreadTaskExecutor.driveUntil(ThreadTaskExecutor.java:122) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at net.minecraft.server.MinecraftServer.runScheduledTasks(MinecraftServer.java:722) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at net.minecraft.server.MinecraftServer.func_240802_v_(MinecraftServer.java:668) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at net.minecraft.server.MinecraftServer.lambda$startServer$0(MinecraftServer.java:233) ~[forge:?] {re:classloading,pl:accesstransformer:B}
   at java.lang.Thread.run(Thread.java:750) [?:1.8.0_345] {}