Pro Site payment issue

I am testing pro-site for my real project. But when I select the payment method "Stripe" and save it remain unchecked and every time I save it keep creating pro-site page (e.g. my pro-site page is mysite.com/pro-site/ it will create mysite.com/pro-site-1/ and so on) previous page will be empty. another thing is if i select paypal my payment method it also become unchecked!! I am not sure I can explain it correctly.