Why can't I login to AGOL layers?

You can't login to the AGOL Layer tab.

The AGOL layer feature is compatible with ERSI 'Built-In' accounts.  Users configured with SAML-based or MFA logins will not be able to access AGOL layers.  This now includes NIFC's National Incident Feature Service (NIFS) used by many agencies for wildfire mapping.

Work around - GISS and others can still access local incident mapping done in Intterra within the ArcGIS Pro by adding the data as a url.  

Click here for more.