How do I share the Refer A Friend link on Facebook?

To share on Facebook, you need to have integration with "Apps, websites and games" turned on.

You can do this by carrying out the following steps:

1. Clicking on your profile picture in the top right of Facebook.
2. Selecting "Settings & privacy" and then click "Settings".
3. Clicking "Apps and websites" in the left side menu.
4. Scrolling down to preferences, then next to "Apps, websites and games" and click "Turn On".