Paypal button transaction does not continue after login

Hello, i am using your plug in and its nice. I have tested before but now i am creating something i really want to put online but the behaviour of a subcribe button has changed.

I have followed the docs on creating a button and have enabled ipn in paypal.

Clicking the subscribe button leads me to Paypal check out page which then requires me to log in but after log in there is no information about the on going transaction neither is there an approval button. So there is no way a user can do a payment.

SWPM is in debug mode and no logs are recorded. Sandbox testing is also checked.

Please help it is the only thing left.