I'm having some serious troubles connecting PBIDesktop to our Azure SSAS Server.
When all goes well i'm getting 2 logon screens (?), one off them will redirect me to our companies login system. After Logging init takes easily up to 30 seconds to get the 2nd one active, there I just have to tap again our login, this time no authentication.
Then, mostly after 1min everything works fine.
But, after starting PBIDesktop a few times with other app's, then going back to one on SSAS Azure i'm only getting 1 of the 2 login or even none.
In this case i'm always getting the OpenConnectionError and the only solution is to restart the whole pc to get back to a startup with 2 logons....
Firstly, I would suggest you mask your private info in the images.
The suggestion I can give is clearing the data source and trying again. I would suggest you file a support ticket here.