This usually occurs if the staff account was created in 1CONNECT before the staff member's email was created.
Always verify that the staff member's email account has been created before creating their staff account in 1CONNECT, otherwise their email will be blocked and they will not receive activation emails
To verify, try resending the activation invite email again by going to the staff members account from the side panel, and clicking the "Send New Invite" button. If the staff still has not received the email, please contact 1VALET support, as their email has likely been blocked by our system because the original invite email bounced (due to not being a valid email at the time of sending).
