That’s exactly what happened to me all day yesterday. I had 90 items in my cart but needed to add the coupon ( DAZPAxmasCheers , which took off another $30.00 or so!) but every single time I tried, it would either log me out or take about 2 minutes before finally throwing up an error message that it was offline. I was so frustrated! But then this morning, around 7 am, it was working again fine, so I quickly added my coupon and walked thru the checkout with no problems. Someone yesterday (above) said that it could’ve been due to other services on the Internet being down which DAZ relies on, and that would explain the outage if the chain was broken. But all you can do is to keep trying. It’s frustrating and sucks I know but eventually you’ll get it. 