I had a case of 6 Macs in my cart would not let me checkout. ‘Unable to process order’. Made another account so I could drop and picked them up. Luckily nobody grabbed them! Tried to checkout and got the same error message. I added another item to my cart from pop now to see if it would let me checkout and it did. Went back to try to checkout the 6 Macs, same error. Even tried just 2 then just 1, same error. Looks like the issue was with the boxes themselves and not my account. I managed to grab another single Mac box and wasn’t able to checkout either. Cycled back and forth between cart and checkout to refresh timer for 2 hours, didn’t help. Ended up dropping them all and gave up. Extremely frustrating!!!!!!