New Account Activation Problem - Paypal

I am getting the following error when I click the activation link during the signup process on WP Multisite.

Parse error: syntax error, unexpected $end in /home/jacob/public_html/wp-content/plugins/pro-sites/pro-sites-files/gateways/gateway-paypal-express-pro.php on line 166

Any ideas as to what might be causing that?

Thank you