Upload of file / crreation of workbook failing with Upload File: Code: BadRequest Message: /me request is only valid with delegated authentication flow

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Hi @sonaliaggarwal47 ,
thanks for the hint. I entered the tenant ID (the one I also used in the Excel scope . I get a new error message now:
Upload File: Code: ResourceNotFound
Message: User’s mysite not found.

Do you have any idea what this is about?

Thanks,
Michael