When I meant sapserver in the url in my previous post, It is the AS ABAP connection. Sorry for the confusion.
Additionally, I still get the same blank screen when I set the AllowTemporaryConnections to True in the NwbcOptions.xml.template.
I am not sure what do you mean by (alias in this case)?
https://<AS ABAP hostname fqdn>:44301/nwbc
https://<AS ABAP hostname fqdn>:44301/sap/bc/nwbc
None of these URL's work.
Also, on a different note, I configured NWBC-SSO on another AS ABAP system via the SAP portal's redirect application suggested by you in your previous posts. Its the exact same behaviour in this case too. It just stops at a blank screen. However, if I close the pop-up window and click on the connection again, it does SSO in the AS ABAP via the redirect portal app and works as expected.
But this is not the case for the SAML SSO. Am I missing something.
Thanks for your support in this issue. You have been a great help so far.