Why this no work

package mel.Polokalap.disabler.Commands;

import mel.Polokalap.disabler.Main;
import net.kyori.adventure.key.Namespaced;
import net.kyori.adventure.text.Component;
import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
import org.bukkit.*;
import org.bukkit.block.Block;
import org.bukkit.block.Sign;
import org.bukkit.block.sign.Side;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.jetbrains.annotations.NotNull;

public class TestCommand implements CommandExecutor {

    private static Main plugin = Main.getInstance();

    @Override
    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command cmd, @NotNull String s, @NotNull String @NotNull [] args) {

        if (!(sender instanceof Player player)) {

            sender.sendMessage(plugin.getConfig().getString("console.player"));
            return true;

        }

        double x = player.getLocation().clone().getX();
        double y = player.getLocation().clone().getY();
        double z = player.getLocation().clone().getZ();

        World world = player.getWorld();

        Location loc = new Location(world, x, y - 5.0d, z);

        Block block = loc.getBlock();
        Material preBlockType = block.getType();
        block.setType(Material.CHERRY_SIGN);

        Sign sign = (Sign) block.getState();

        sign.getSide(Side.FRONT).line(2, Component.translatable("key.forward"));
        sign.getSide(Side.FRONT).line(1, Component.translatable("block.minecraft.cobblestone"));
        sign.getSide(Side.FRONT).line(0, Component.translatable("text.autoconfig.appleskin.title"));

        sign.setEditable(true);
        sign.setAllowedEditorUniqueId(player.getUniqueId());
        sign.update();

        player.openSign(sign, Side.FRONT);

        String line0 = PlainTextComponentSerializer.plainText()
                .serialize(sign.getSide(Side.FRONT).line(0));

        String line1 = PlainTextComponentSerializer.plainText()
                .serialize(sign.getSide(Side.FRONT).line(1));

        String line2 = PlainTextComponentSerializer.plainText()
                .serialize(sign.getSide(Side.FRONT).line(2));

        player.sendMessage(line0);
        player.sendMessage(line1);
        player.sendMessage(line2);
        System.out.println(line0);
        System.out.println(line1);
        System.out.println(line2);

        player.closeInventory();
        block.setType(preBlockType);

        return true;

    }

}