I was trying to place an order at an online store and I keep getting this error : "There was an error while adding this card." I did try using my credit and debit card and another credit card, but it keeps giving me the same error. At first, I thought it was a problem with the store, so I decided to shop at another online store, which also takes me to shopify.com and gives me the same error. I've shopped at both places before.
I have the same problem. I can not add a company debit card on file and thus am unable to shop. The card was valid before, expired so I have deleted but am currently unable to add the new one. @matt01 did you manage to get over this issue?