Do Sandbox Accounts need to have Payouts added to them by PayPal?

Question

On my Paypal developer dashboard My Account page I see a little green check mark for Payouts on sandbox accounts and 'Enable' for live accounts. But when I log into the sandbox account itself and go to Mass Payments it is telling me I need to contact Paypal to have this service enabled.

Is this not the same as Payouts? And if it is, do I need to have it enabled for a sandbox account? Or is it already enabled for sandbox accounts?

I am trying to make some calls to the Payouts API on this sandbox account and it is giving me an Authorization Error.

Cheers

UPDATE

Here is the scope from the token request:

https://uri.paypal.com/services/invoicing https://uri.paypal.com/services/vault/payment-tokens/read https://uri.paypal.com/services/disputes/read-buyer https://uri.paypal.com/services/payments/realtimepayment https://uri.paypal.com/services/disputes/update-seller https://uri.paypal.com/services/payments/payment/authcapture openid https://uri.paypal.com/services/disputes/read-seller Braintree:Vault https://uri.paypal.com/services/payments/refund https://api.paypal.com/v1/vault/credit-card https://api.paypal.com/v1/payments/.* https://uri.paypal.com/services/reporting/search/read https://uri.paypal.com/payments/payouts https://uri.paypal.com/services/vault/payment-tokens/readwrite https://api.paypal.com/v1/vault/credit-card/.* https://uri.paypal.com/services/subscriptions https://uri.paypal.com/services/applications/webhooks

RESPONSE ERROR

This is the response I get when making a call...

{"name":"AUTHORIZATION_ERROR","message":"Authorization error occurred.","debug_id":"7c7330885dfd7","information_link":"https://developer.paypal.com/docs/api/payments.payouts-batch/#errors","links":[]}