So the whole store is behind a login (you must be logged in to even view the catalog and/or cart)? 

If this is the case, have you tested with the catalog and cart set for All Users?

Do you know if this is an issue in older versions of DNN or if this is specific to DNN 4.9.0?

Best Regards,

Robert J Collins | Co-Founder & President

Netlogic Corporation

The reason I ask about the permissions is the way that the Store knows an order is completed is that PayPal sends a callback link to the "PayPal Gateway Control" which is part of the module that loads in the page.  That page and its cart module(s) needs to be accessible to anonymous web requests in order to accept the incoming PP confirmation of completed sale (since PayPal is not going to log into your site to access the page). I think in a later build we may need to move the callback to and ASPX page so this is not an issue. 

You can work around this by putting the catalog etc on a secured page and then loading the cart onto a page that is accessible by everyone (all users).  To prevent it from being easily assessed by anyone unselect the check mark "show in menu" in the page settings and then create a link to the cart and/or use the mini cart to access the cart page.  This will hide it from general viewing and still allow PayPal to access it for confirmation.

Best Regards,

Robert J Collins | Co-Founder & President

Netlogic Corporation