At the first registration in the builder of Ecostruxure Augmented Operator Advisor you can get the following message:

It is probably because this email is already used for another Schneider web application (example: Machine Advisor)
All Schneider web application use the same login / password
So, in order to connect to Ecostruxure Augmented Operator Advisor, reuse the login password already create before for another Schneider Web Application

Released for: Schneider Electric Ireland