Paypal Sandbox PHP Error When Testing

I am just testing my new site setup.

When I attempt to pay/upgrade using Paypal Sandbox I get the following message:

Fatal error: Call to a member function get_error_message() on a non-object in /home/user/public_html/sitebuilder/wp-content/plugins/pro-sites/pro-sites-files/gateways/gateway-paypal-express-pro.php on line 2127

This common or I found a new bug? :slight_smile: