The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.
https://bbox.blackbaudhosting.com/webforms/linkredirect?srcid=25234711&srctid=1&erid=1694825466&trid=f32557b2-f3cd-40bf-bd01-0bad5ac25402&linkid=244400143&isbbox=1&pid=0