Loading Multiple Bing Accounts

I have multiple bing accounts that I'm trying to connect to Google Data Studio using the Ad Data + Google Analytics tool.  
I'm able to add and authenticate both accounts.  However, when I try to use the data I am always given the following access error 

"Error: Microsoft Advertising failure (You have insufficient privileges to access Microsoft Advertising account #######.) (Supermetrics request ID: KY0j2sbr1S...)."

This always occurs with the first one I add.  If I re-authenticate the account that gives the error, I then lose access to the other account.  The report runs fine if I only use one Bing account.

Thanks for the help!