After upgrade to Aria operations 8.18.3 , Error: "Single Sign-On Redirect URL is Null" is displayed when logging in using the preconfigured SSO SAML from vcenter server.
Aria Operations 8.18.x
From Aria Operations 8.18 we can configure vCenter server SSO directly in Authentication Sources using the 'VMware SSO' option in the source.
Option 1 :
Option 2: