To install the Quizzes add-on, just navigate to the WordPress dashboard and go to MemberPress -> Add-ons. Locate the Course Quizzes add-on, and click “Install Add-on” to add it to the system.

If you can't find it on the list, there are some possible reasons for that:

• for instance, if you're on the Basic subscription. The add-on is available only for Plus and Pro clients, so you might need to upgrade
• the license key is not activated in MemberPress -> Settings -> License. Make sure it is correctly added and if needed try to re-enter it