Using Embedded Frame and BI OpenDocument secured URL (HTTPS)

The context :

Here is the layout of my first application (APPLI_1) which is used as a container for other applications :

Any embedded application are quite similar :

Basically, I wanna open APPLI_1 and see APPLI_2 in it and displaying DOCUMENT :

And it works… but only on local :

It DOES NOT work when executing on BI Platform….

What I see with opendocument :

I can see my header 1 and then my heder 2 very briefly but finnaly it only displays the document in my browser window.

What I did :

APPLI_1 :

On Startup, a specific Design Studio application (APPLI_2) URL (OpenDocument….) is loaded into embedded frame  FRAME_VIEWER that takes 100% space of PANEL 2 (margins = 0, width/height = auto):

//g_home_url redirected on APPLI_2 URL

g_home_url ="https://my_platform/BOE/OpenDocument/opendoc/openDocument.jsp?sIDType=CUID&iDocID=AbaYTt8drhRPkaGVlkwz0_4";

VIEWER_FRAME.setUrl(g_home_url);

APPLI 2 :

On Startup, a specific WebIntelligence Document  (DOCUMENT_2) URL  (OpenDocument….) is loaded into embedded frame FRAME_VIEWER_2  that takes 100% space of PANEL 4 (margins = 0, width/height = auto ).

/*

* Document URL

*/

g_document_url ="https://my_platform/BOE/OpenDocument/opendoc/openDocument.jsp?sIDType=CUID&iDocID=AUP_KxaGOQpJul11HA45IQU&sInstance=Param&lsSRegion_ID=+3";

VIEWER_FRAME2.setUrl(g_document_url);

The error seems to occur when using opendocument URL with https url : HTTPS://my_platform/BOE/OpenDocument....

Because if I replace by http url it works.

Any idea to make it working ? Or another component ?

Thanks