Sometimes people do not accept your invitation to join your Process Street organization, they perhaps didn’t receive the email or just archived it by accident. Well, the good news is you can very easily send another invitation email.
Firstly, just click on your Organization name in the top right.
Then just scroll to the person you want to resend the invitation to, and you will see you can resend the invite.
Your invitee will then receive a new invitation via email to join your organization. They can follow the link included to confirm their account.