Thank you for reaching out to the Community and bringing this to our attention! You should definitely not receive this popup as you're actively working. What exactly were you working on when this happened?
In fact we would like to collect more details on this experience from you. For instance:
Please email us these answers along with your username, a reference to this post, and any screenshots of this popup you may have to social_support(at)constantcontact(dot)com. Once we have these details it can then be passed on to our engineers are they continue to look into this. While we do not have a time estimate of when this will be fixed, as a work around we suggest clicking 'Continue working' to proceed. I apologize for any inconvenience this may be causing and have added you to our queue to be notified when this is resolved.
I wanted to make sure you were updated and made aware that this experience has been resolved. Please let us know if there is anything else we can assist with in the meantime.