so its my first script and i need a little help  title pretty much says all
 
	my code:
 
import org.osbot.rs07.api.map.Area;
import org.osbot.rs07.api.ui.RS2Widget;
import org.osbot.rs07.api.ui.Skill;
import org.osbot.rs07.script.Script;
import org.osbot.rs07.script.ScriptManifest;
import org.osbot.rs07.api.ui.EquipmentSlot;
import org.osbot.rs07.api.Equipment;
if (!equipment.isWearingItem(EquipmentSlot.RING, duelring -> duelring.getName().contains("Ring of dueling"))){
            getBank().withdraw("Ring of dueling(8)",1);
            sleep(random(500, 1000));
            bank.close();
            sleep(random(500,1000));
            inventory.getItem("Ring of dueling(8)").interact("Wear");
            sleep(random(500,1000));
	and one more question why i am getting this error ?