I am currently working on an SAP Portal which was upgraded to version 7.5 SP04. I am trying to design a new theme with the SAP Theme Designer on the portal. I am able to load the theme editor just fine on the portal. However I am unable to preview the AJAX Framework Page or any of the Framework pages available under Portal Control Previews. I see the popup which tells me "The application preview cannot be loaded".
Below is what I see in the Chrome Developer Console. Everything I am accessing is in the same domain, everything is https so I am not sure why the below error shows up related to iFrames. I am able to load a Fiori Application which runs in the same domain and theme it just fine - but the preview for any framework pages do not work.
I am using the theme designer on the SAP NW Portal (Java Stack) accessible from
Portal Content -> Portal Display Portal Themes ->UI Theme Designer
Portal version information
AJAX-RUNTIME 1000.7.50.4.0.20160613143100 EP-BASIS 1000.7.50.4.0.20160708110700 EP-BASIS-API 1000.7.50.4.0.20160613184000 EP-FLP 1000.7.50.4.0.20160613184000 EP-RUNTIME 1000.7.50.4.0.20160613184000 UISAPUI5_JAVA 1000.7.50.4.0.20160713180900
Would appreciate any assistance to help resolve this.