Paypal auto-enrol does not work with Moodle 2.3

Visit <yoursite>/admin/settings.php?section=manageenrols and turn on PayPal. Click on the settings and set PayPal business email to 'markn_1351839182_biz@moodle.com' (you can use yours if you have one set up) In the config.php file add '$CFG->usepaypalsandbox = true;' Create a course that uses the PayPal enrolment plugin and set the price to $1. Log in as a student and click on the course, then the PayPal link. Enter your email as 'markn_1351765059_per@moodle.com' (again, use another one if you have an account set up) and the password '12345678'. Confirm payment and click on the link to go back to your Moodle site. Ensure the following error does not occur - Coding problem: $PAGE->context was not set. You may have forgotten to call require_login() or $PAGE->set_context(). The page may not display correctly as a result Note: You will not be enrolled in the course as PayPal needs to be able to communicate to your localhost server. This test simply ensures the PHP error does not occur which the community has reported is causing the issue with users not enrolling.