When I tested PayPal using sandbox, I got it working. But when I use my clients email address and test it in live mode, I get this error.
The link you have used to enter the PayPal system is invalid. Please review the link and try again.
My clients email address is legit, as he has paid me from it before using PayPal. The site is to be turned into the client today. Please advise as to what the problem could be.
Thanks.
