Pro Sites Stripe PHP errors

1. When you remove a site's pro status, the Stripe customer still has the subscription attached to it.
2. When a customer upgrades their plan and clicks subscribe, they get the following error message:

Fatal error: Call to undefined method Stripe_Object::save() in /...../wp-content/plugins/pro-sites/pro-sites-files/gateways/gateway-stripe.php on line 2979

Other than that the subscription seems to go through correctly.
3. When a customer cancels their subscription in Pro Sites, they get the following error message:

Fatal error: Call to undefined method Stripe_Object::cancel() in /...../wp-content/plugins/pro-sites/pro-sites-files/gateways/gateway-stripe.php on line 1611

As with #1, the subscription remains active in Stripe, and also in the Wordpress admin panel.