Are you trying to take claim contact hours from the Old Agile PrepCast™? This article clarifies if you could still take the final exam for the Old Agile PrepCast™.
Accessing the Final Exam for the Old Agile PrepCast™
Yes. If you purchased The Agile PrepCast™ before September 20, 2018, and you wish to take the old PMI Agile Certified Practitioner (PMI-ACP)® Final Exam to claim your 21 contact hours certificate, please log on to https://www.project-management-prepcast.com/acpfinal. All the details are there.