Actually no I have not got any answer.
I currently contacted Stripe and try to solve how to setup the payment system and then see how it will work in the marketplace.
I am wondering the same thing!
Maybe they support members only from now on.
Abhishek, thank you for your response.
I thought nobody had faced this problem!
Yes, I had.
Actually, I left the settings as it should be and logged out for the night.
The next day when I logged in and went on to test it again, it was working just fine !
I do not now what happened, maybe cache was cleared, no idea, but it was working!