Note: You do not need any valid credentials for either payment gateways, or accounts Log in to Moodle as admin Visit "Site administration > Plugins > Payment gateways > Manage payment gateways" and enable the PayPal gateway Create a Payment account via "Site administration > Payments > Payment accounts". Make sure to select the 'Enable' checkbox. Click on the 'PayPal' link associated with the payment account you just created and configure the settings. Fill the settings with dummy values. Make sure to select the 'Enable' checkbox. Visit "Site administration > Plugins > Enrolments > Manage enrol plugins" and enable the "Enrolment on payment" plugin Go to a course and then go to 'Enrolment methods' via the gear menu or the Administration block Add Enrolment on payment as an enrolment method and set "Enrol cost" to $10 Go to  "Site administration > Language > Language customisation" and edit  Proceed with editing the English language pack and load strings of the "paygw_paypal.php" component Customise the string for the "gatewaydescription" to the following < a href = "https://www.paypal.com/" >PayPal</ a > is an authorised payment gateway provider for processing credit card transactions. Save changes to the language pack Log in as a user and attempt to enrol yourself in the course Click on the "Select payment type" button Verify that the gateway selection modal is loaded with no error