Double-check the coupon's expiration date and scope of application. Ensure the coupon is still valid and applicable to the items in the cart. Verify the coupon code for any typos or errors. Clear the browser's cache and cookies to remove any potential conflicts. Try using a different browser or device to see if the issue persists. Contact customer support for assistance with the coupon code. Check for any restrictions or limitations on the coupon's usage. Ensure the items in the cart meet the minimum purchase requirements for the coupon. Look for alternative coupon codes that might be available. Disable any browser extensions that could interfere with the coupon application process.
