Creating a dataflow wants me to sign in and throws error

[Anonymous]

We have migrated our tenant to Australia and a user is trying to create a dataflow but is getting an error.
The datasource is an excel file within a sharepoint site.

Set authentication kind to organizational account and then it asks user to sign in, which is weird as they had already signed in to get to this point.

If you select the signin button then an Oauth redirect page gets hit and is blank.

Is there an MFA setting we need to enable?

[v-qiuyu-msft]

Hi @Anonymous, 

I would suggest you access the SharePoint Excel with the same account in a browser tab, then create a dataflow in the same browser, sign in with your account, check if the same issue occurs. 

Best Regards,
Qiuyun Yu