Forbidden authentication in Sandbox environment

Hi, I'm trying to autenticate in a sandbox environment retireving keyId. I'm making the request in PHP with:

...

\SatispayGBusiness\Api::setSandbox(true);

$authentication = \SatispayGBusiness\Api::authenticateWithToken("CODE_RECEIVED_IN_EMAIL");

...

The response is:

Exception: Forbidden, request id: mAO1jmAn in .../satispaySDK/lib/Request.php:235

How can i make the activation?
Thanks