Pro Sites Choose Plan Buttons won't link to payment/checkout page

I have created a fresh wordpress multisite install and have added pro site and wpmu dashboard.
I created two levels with monthly only pricing.
In settings I have checked "signup on checkout" yes
"allow free signup" no
allow multiple blogs yes
I have enabled the Pay to Blog Option, Premium plugins manager, and premium themes.
I have enable Stripe Gateway in test mode and manual payments.

I am accessing the Prosites via the following URL ""

Upon loading the page I click the choose level button, but nothing happens.

Just wondering if i have conflicting settings somewhere. appreciate the help,
kindest regards,