When we are opening the APM SAAS document, it is showing 404 : PAGE NOT FOUND
The issue is that when we go to the following document page:
You will see APM SAAS there, if you select that, it is taking you to the broken link as follows instead of SAAS link:
Release : 21.3
Component : Introscope
Please clear browser cache and try again. Also test with another browser and see if it works.