Revise paste x-prison error

version x-prison
[03:20:03 INFO]: X-Prison version 2026.2.0.0
Website: www.drawethree.dev
Author: Drawethree
[03:20:12 INFO]: ShadowMX issued server command: /sellprice 100 mine-a
[03:20:12 ERROR]: Command exception: /sellprice 100 mine-a
org.bukkit.command.CommandException: Unhandled exception executing command 'sellprice' in plugin helper v5.6.14
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:47) ~[paper-api-1.21.11-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.command.brigadier.bukkit.BukkitCommandNode$BukkitBrigCommand.run(BukkitCommandNode.java:83) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at com.mojang.brigadier.context.ContextChain.runExecutable(ContextChain.java:73) ~[brigadier-1.3.10.jar:?]
        at net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:30) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:13) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.commands.execution.UnboundEntryAction.lambda$bind$0(UnboundEntryAction.java:8) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.commands.execution.CommandQueueEntry.execute(CommandQueueEntry.java:5) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.commands.execution.ExecutionContext.runCommandQueue(ExecutionContext.java:104) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.commands.Commands.executeCommandInContext(Commands.java:469) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.commands.Commands.performCommand(Commands.java:374) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.commands.Commands.performCommand(Commands.java:362) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.performUnsignedChatCommand(ServerGamePacketListenerImpl.java:2374) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$12(ServerGamePacketListenerImpl.java:2347) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:177) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1530) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:188) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:151) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1510) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1504) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.MinecraftServer.recordTaskExecutionTimeWhileWaiting(MinecraftServer.java:1230) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1346) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:388) ~[paper-1.21.11.jar:1.21.11-101-57c7aac]
        at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.lang.NullPointerException: Cannot invoke "dev.drawethree.xprison.api.currency.model.XPrisonCurrency.format(double)" because the return value of "dev.drawethree.xprison.autosell.manager.AutoSellManager.getCurrency()" is null
        at X-Prison.jar//dev.drawethree.xprison.autosell.command.SellPriceCommand.handle(SellPriceCommand.java:91) ~[?:?]
        at helper.jar//me.lucko.helper.command.functional.FunctionalCommand.call(FunctionalCommand.java:65) ~[?:?]
        at helper.jar//me.lucko.helper.command.AbstractCommand.onCommand(AbstractCommand.java:65) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45) ~[paper-api-1.21.11-R0.1-SNAPSHOT.jar:?]
        ... 24 more