If you are unable to view the +Create Message button and create a new Connect message, it's likely that you do not have the necessary access level to MyBlackbird. Below are the various access levels and their capabilities within the Connect block:
Admin Access - View dashboard. Create, edit, and delete messages and lists. View and copy collect embed for that location.
Manager Access - View messages and lists. View and copy collect embed for that location.
Staff Access - N/A
Your access level must be changed by a user from your organization or location with Admin-level access. To learn more about adjusting employees' access levels, click here.