Fairphone discount code unvalid after canceled order

I received a promo code for Fairphone 4 and added that to the cart and went up to the payment method. I didn’t like something about a selected payment method and cancelled it.

Since then, the promo code is no longer valid.

Is the code now lost?

Is your “shopping cart” empty now? If not, you might just be able to resume the process.

Not empty. Have also already tried to empty cart and then added again Fairphone 4.