The LTI integration requires that an email address be present on the student and/or instructor profile within the LMS. If no email address is entered, the error message Turnitin LTI Error - Field "lis_person_contact_email_primary" is not a valid email address should appear.
To verify that an email address is entered within the Learning Management System (LMS), users can go to the Settings page and see the Email Addresses field to the upper right of the screen.
It is also important to verify that the user account is not set to anonymous, as this could hide the email address from Turnitin.
Please consult your LMS-specific help guide for more information.
Note: This error message will appear to instructors while in the Student View. The Student View for instructors does not pass on a valid email address and role to Turnitin, and therefore cannot be used to preview the assignment.