docs update okta instructions to ensure the Classic UI view is selected

doc/administration/auth/okta.md

@@ -14,7 +14,9 @@ The following documentation enables Okta as a SAML provider.
 
 ## Configure the Okta application
 
-1. On Okta go to the admin section and choose to **Add an App**.
+The following guidance is based on this Okta article, on adding a [SAML Application with an Okta Developer account](https://support.okta.com/help/s/article/Why-can-t-I-add-a-SAML-Application-with-an-Okta-Developer-account?language=en_US):
+
+1. On Okta admin section, make sure to select Classic UI view in the top left corner. From there, choose to **Add an App**.
 1. When the app screen comes up you see another button to **Create an App** and
    choose SAML 2.0 on the next screen.
 1. Now, very important, add a logo