Default Thank you page says "back to homepage" instead of "click to register"

Hello,
I’m trying to configuring S2Member with paypal sandbox.
I managed to have everything work until the thank you page.
I don’t see anything showing a link to enable the user to register. The button only says “back to homepage”.
What am i missing ?

Thank you in advance

Don’t use the sandbox. It’s very unreliable. Try using very small payments instead.

Thank you for the tip.
Paypal must be very happy if everyone who need to do testing will do that.

Maybe! I think they are just lazy, and haven’t kept the sandbox up to date. (It’s yet another reason to use Stripe instead, if you can.)