Hi @Aundrinea ,
You have posted someone's email address on a global site; please remove the image, redact that information, and repost the error message.
Based on the error message, it seems that the user may need to go into their own Settings on Canvas and verify their email account. A user can operate in Canvas courses without being verified, so this user's previous status as a student does not indicate that their email has ever been verified. The user should go to Account->Settings and look for the email address on the right side. If there is an exclamation point (!), the user should click on it and follow the onscreen prompts.