Issue with player heads on folia 1.21.4

[mati9012]

Describe the bug
I have this error when I use trade gui on 1.21.4 folia (offline mode)

[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.player.data.Skin.getElement(Skin.java:221)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.player.data.GameProfileUtils.extractSkinId(GameProfileUtils.java:108)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.tools.items.ItemBuilder.setSkullId(ItemBuilder.java:974)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.gui.layout.types.impl.cosmetics.PlayerHeadUtils.applyPlayerHead(PlayerHeadUtils.java:18)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.gui.layout.types.impl.cosmetics.PlayerHeadUtils.applyPlayerHead(PlayerHeadUtils.java:13)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.gui.layout.types.impl.basic.StatusIcon$CannotReadyIcon.prepareItemStack(StatusIcon.java:164)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.gui.layout.types.SimpleTradeIcon$1.buildItem(SimpleTradeIcon.java:26)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.player.gui.inventory.v2.Page.lambda$deploy$0(Page.java:51)
[09:54:37 WARN]:        at java.base/java.util.HashMap.forEach(HashMap.java:1429)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.player.gui.inventory.v2.Page.deploy(Page.java:51)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.player.gui.inventory.v2.Page.apply(Page.java:41)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.player.gui.inventory.v2.GUI.switchTo(GUI.java:193)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.player.gui.inventory.v2.GUI.registerPage(GUI.java:177)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.gui.TradingGUI.prepareStart(TradingGUI.java:36)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.BukkitTrade.createGUIs(BukkitTrade.java:40)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.Trade.start(Trade.java:228)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.TradeHandler.startTrade(TradeHandler.java:369)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.TradeHandler.startTrade(TradeHandler.java:333)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.managers.InvitationManager.accept(InvitationManager.java:323)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.trade.managers.InvitationManager.handleInvitation(InvitationManager.java:254)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.spigot.commands.TradeCMD$4.runCommand(TradeCMD.java:78)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.server.commands.builder.special.MultiCommandComponent.runCommand(MultiCommandComponent.java:28)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.server.commands.builder.CommandBuilder.onCommand(CommandBuilder.java:238)
[09:54:37 WARN]:        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:45)
[09:54:37 WARN]:        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:178)
[09:54:37 WARN]:        at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:1031)
[09:54:37 WARN]:        at TradeSystem_v2.6.3.jar//de.codingair.tradesystem.lib.codingapi.server.commands.builder.CommandWrapper.run(CommandWrapper.java:90)
[09:54:37 WARN]:        at com.mojang.brigadier.context.ContextChain.runExecutable(ContextChain.java:73)
[09:54:37 WARN]:        at net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:30)
[09:54:37 WARN]:        at net.minecraft.commands.execution.tasks.ExecuteCommand.execute(ExecuteCommand.java:13)
[09:54:37 WARN]:        at net.minecraft.commands.execution.UnboundEntryAction.lambda$bind$0(UnboundEntryAction.java:8)
[09:54:37 WARN]:        at net.minecraft.commands.execution.CommandQueueEntry.execute(CommandQueueEntry.java:5)
[09:54:37 WARN]:        at net.minecraft.commands.execution.ExecutionContext.runCommandQueue(ExecutionContext.java:105)
[09:54:37 WARN]:        at net.minecraft.commands.Commands.executeCommandInContext(Commands.java:458)
[09:54:37 WARN]:        at net.minecraft.commands.Commands.performCommand(Commands.java:365)
[09:54:37 WARN]:        at net.minecraft.commands.Commands.performCommand(Commands.java:355)
[09:54:37 WARN]:        at net.minecraft.commands.Commands.performCommand(Commands.java:349)
[09:54:37 WARN]:        at net.minecraft.server.network.ServerGamePacketListenerImpl.performUnsignedChatCommand(ServerGamePacketListenerImpl.java:2295)
[09:54:37 WARN]:        at net.minecraft.server.network.ServerGamePacketListenerImpl.lambda$handleChatCommand$14(ServerGamePacketListenerImpl.java:2268)
[09:54:37 WARN]:        at net.minecraft.server.TickTask.run(TickTask.java:18)
[09:54:37 WARN]:        at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:155)
[09:54:37 WARN]:        at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24)
[09:54:37 WARN]:        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1494)
[09:54:37 WARN]:        at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:176)
[09:54:37 WARN]:        at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:129)
[09:54:37 WARN]:        at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1474)
[09:54:37 WARN]:        at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1468)
[09:54:37 WARN]:        at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:139)
[09:54:37 WARN]:        at net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:1425)
[09:54:37 WARN]:        at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1433)
[09:54:37 WARN]:        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1310)
[09:54:37 WARN]:        at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:313)
[09:54:37 WARN]:        at java.base/java.lang.Thread.run(Thread.java:1583)

To Reproduce
Use some PlayerHead in gui with custom texture and custom model

Discord contact: _mati90_