[15:35:30 ERROR]: [CharlieRP] Exception while handling click event in inventory 'Seleziona giocatore', slot=0, item=PLAYER_HEAD
java.lang.NullPointerException: Cannot invoke "java.lang.Integer.intValue()" because the return value of "java.util.HashMap.get(Object)" is null
        at anotherlevel.charlierp.jobs.mechanical.MechanicUtils.lambda$openMechanicMenu$8(MechanicUtils.java:253) ~[CharlieRP-0.5.jar:?]
        at anotherlevel.charlierp.utility.ItemUtils.lambda$selectPlayerFromRadius$1(ItemUtils.java:74) ~[CharlieRP-0.5.jar:?]
        at com.github.stefvanschie.inventoryframework.gui.GuiItem.callAction(GuiItem.java:179) ~[CharlieRP-0.5.jar:?]
        at com.github.stefvanschie.inventoryframework.pane.StaticPane.click(StaticPane.java:238) ~[CharlieRP-0.5.jar:?]
        at com.github.stefvanschie.inventoryframework.gui.InventoryComponent.click(InventoryComponent.java:205) ~[CharlieRP-0.5.jar:?]
        at com.github.stefvanschie.inventoryframework.gui.type.ChestGui.click(ChestGui.java:161) ~[CharlieRP-0.5.jar:?]
        at com.github.stefvanschie.inventoryframework.gui.GuiListener.onInventoryClick(GuiListener.java:82) ~[CharlieRP-0.5.jar:?]
        at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor1334.execute(Unknown Source) ~[?:?]
        at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
        at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:77) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:git-Paper-496]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) ~[paper-1.20.4.jar:git-Paper-496]
        at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126) ~[paper-1.20.4.jar:git-Paper-496]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:615) ~[paper-api-1.20.4-R0.1-SNAPSHOT.jar:?]
        at net.minecraft.server.network.ServerGamePacketListenerImpl.handleContainerClick(ServerGamePacketListenerImpl.java:3119) ~[?:?]
        at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:58) ~[?:?]
        at net.minecraft.network.protocol.game.ServerboundContainerClickPacket.handle(ServerboundContainerClickPacket.java:25) ~[?:?]
        at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:54) ~[?:?]
        at net.minecraft.server.TickTask.run(TickTask.java:18) ~[paper-1.20.4.jar:git-Paper-496]
        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:149) ~[?:?]
        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24) ~[?:?]
        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1465) ~[paper-1.20.4.jar:git-Paper-496]
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:194) ~[paper-1.20.4.jar:git-Paper-496]
        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:123) ~[?:?]
        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1442) ~[paper-1.20.4.jar:git-Paper-496]
        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1365) ~[paper-1.20.4.jar:git-Paper-496]
        at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:133) ~[?:?]
        at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1343) ~[paper-1.20.4.jar:git-Paper-496]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1232) ~[paper-1.20.4.jar:git-Paper-496]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:319) ~[paper-1.20.4.jar:git-Paper-496]
        at java.lang.Thread.run(Thread.java:1583) ~[?:?]