If an employee receives this error when trying to invite Peers to their Review, please find the explanation as to why this happens below:
Employees won’t be able to send peer invitations if they can’t see each other’s email addresses. That’s because the invitation process relies on email visibility, without it, the system can’t recognise who to invite.
Make sure the Email field is visible to the relevant people. This can be defined in the People's Data Fields section and then adjusted in the permission groups that grant access to the Category where the Email field is located.