Paypal Integration with django

Hye, everyone! I am working on a web app using Django and I am trying to integrate Paypal API into it. In the country in which I live, Paypal doesn’t work here officially. So I asked my friend in Canada to make one personal account so that I can use it for testing purposes. I followed Django Paypal Payment Gateway Integration Tutorial - YouTube for this. But when I enter his credentials of my friend to login , it says
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Can anyone please help!

I know it’s late but this might help others.

You will receive this message if you’re using a developer’s sandbox facilitator account as the receiver email (‘business’) and trying to use a real PayPal account rather than using a special sandbox client account.
Both are created on the developer’s site.
https://developer.paypal.com/dashboard/accounts