Okay, I understand your issue better now.
Yes, you first need to connect before you can click Okay.
But for me, when I click connect, I do not get a popup.
Could you confirm that the web gui is correctly working for your BPC ABAP backend ?
You can do this by opening a browser and going to a this url :
e.g. : http://<hostname>:<port>/sap/bpc/
When I do this I get this in my browser:
But the important thing is there is no additional log on screen or prompt
e.g. a logon screen with a system that is not configured with ABAP HTML SPNEGO:
I hope this helps...
Kind Regards,
chris