Some players can't open Playervaults

[SumoMonke]

The error in question. he gets the msg "An internal error occurred while attempting to perform this command."


[09:26:16 INFO]: FrenchRatty issued server command: /pv 1 [09:26:16 ERROR]: null org.bukkit.command.CommandException: Unhandled exception executing command 'pv' in plugin PlayerVaults v3.6.0-bSNAPSHOT at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?] at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:155) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?] at org.bukkit.craftbukkit.v1_20_R1.CraftServer.dispatchCommand(CraftServer.java:987) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at org.bukkit.craftbukkit.v1_20_R1.command.BukkitCommandWrapper.run(BukkitCommandWrapper.java:64) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at com.mojang.brigadier.CommandDispatcher.execute(CommandDispatcher.java:265) ~[paper-1.20.1.jar:?] at net.minecraft.commands.Commands.performCommand(Commands.java:324) ~[?:?] at net.minecraft.commands.Commands.performCommand(Commands.java:308) ~[?:?] at net.minecraft.server.network.ServerGamePacketListenerImpl.performChatCommand(ServerGamePacketListenerImpl.java:2354) ~[?:?] at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$21(ServerGamePacketListenerImpl.java:2314) ~[?:?] at net.minecraft.util.thread.BlockableEventLoop.lambda$submitAsync$0(BlockableEventLoop.java:59) ~[?:?] at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1768) ~[?:?] at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:153) ~[?:?] at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?] at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1338) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:197) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:126) ~[?:?] at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1315) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1308) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:136) ~[?:?] at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1286) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1174) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:317) ~[paper-1.20.1.jar:git-Paper-"f042be6"] at java.lang.Thread.run(Thread.java:833) ~[?:?] Caused by: java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1597) ~[?:?] at java.util.HashMap$EntryIterator.next(HashMap.java:1630) ~[?:?] at java.util.HashMap$EntryIterator.next(HashMap.java:1628) ~[?:?] at com.drtshock.playervaults.vaultmanagement.Serialization.deserialize(Serialization.java:151) ~[PlayerVaults.jar:?] at com.drtshock.playervaults.vaultmanagement.Serialization.deserialize(Serialization.java:157) ~[PlayerVaults.jar:?] at com.drtshock.playervaults.vaultmanagement.Serialization.toInventory(Serialization.java:102) ~[PlayerVaults.jar:?] at com.drtshock.playervaults.vaultmanagement.UUIDVaultManager.getInventory(UUIDVaultManager.java:151) ~[PlayerVaults.jar:?] at com.drtshock.playervaults.vaultmanagement.UUIDVaultManager.loadOwnVault(UUIDVaultManager.java:91) ~[PlayerVaults.jar:?] at com.drtshock.playervaults.vaultmanagement.VaultOperations.openOwnVault(VaultOperations.java:150) ~[PlayerVaults.jar:?] at com.drtshock.playervaults.vaultmanagement.VaultOperations.openOwnVault(VaultOperations.java:175) ~[PlayerVaults.jar:?] at com.drtshock.playervaults.commands.VaultCommand.onCommand(VaultCommand.java:35) ~[PlayerVaults.jar:?] at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[paper-api-1.20.1-R0.1-SNAPSHOT.jar:?]