Cannot update Data Credentials to Service Account credentials

Hello there! I am trying to add a service account as the data credentials for a Big Query data source in Looker Studio following carefully the relevant guide. The issue is that when I click the update button the window vanishes and nothing happens (no errors just the window of the update data credentials closing). I checked in the console for errors and in the networking tab for any activity during or after the click of the Update button but nothing seems to be happening. 

I would really it appreciate if anyone has any insights on this. 
Thanks in advance!

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