I see you never updated the original thread.
I ran into the same issue today but I just added some code to fix it.
Just letting you know incase you wanted to update OP :P
PLEASE DON'T CODE LIKE THIS. CHANGE IT TO
if (!getInventory.contains("Ring of dueling(8)") {
getBank().withdraw("Ring of dueling(8)",1);
} else if (getBank.isOpen) {
bank.close();
} else {
inventory.getItem("Ring of dueling(8)").interact("Wear");
}