The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.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://archive.iwc.int/pages/view.php?search=!collection73+&k=&modal=&display=thumbs&order_by=relevance&offset=0&per_page=240&archive=&sort=DESC&restypes=&recentdaylimit=&foredit=&ref=2122