s2member is on one website: Makemoneyonlinewithlu.com. There I use s2member to run my membership site. That;s only one product that I sell.
I run other sites as well.
On those other sites I sell products not related to makemoneyonlinewithlu.com or s2member.
For example, on loopholemarketers.com I sell things using Paypal as the payment processor. When people make purchases there, they get the error I mention in the title of this thread.
I also sell things to my email list. When doing this, I use the raw URL from paypal, I place that link in the email and people buy from there (also has nothing to do with s2member) but when they buy they get the error above.
So to recap, s2member is on one website and I only use it there.
I sell other products that have nothing to do with s2member, using paypal alone, but there I get an s2member error, as show in my threads title