I couldn't find any course about CLSA Architecture Exam in 8.3, and the other lower versions. In LSA Certification page in Pega Academy, There has been information belov,
PLEASE NOTE: The Lead System Architect course has not yet been migrated to the new Pega Academy system. If you are interested in taking this exam, please complete the Lead System Architect course in the previous Pega Academy application.
When i click the previous Pega Academy Application link, I opened the below link that is not getting the any previous course.