Reference
PAYPAL_CREDENTIALS_REJECTED
PayPal refused the REST app credentials
PayPal refused the REST app credentials
HTTP status 400 Bad Request, code PAYPAL_CREDENTIALS_REJECTED.
What it means#
PayPal did not accept the client id and secret for the environment named, so nothing was stored.
What to do#
Copy the client id and secret of a REST app from the PayPal developer dashboard, for the same environment (sandbox or live), and connect again.
On the wire#
Every error response carrying this code names this page in error.moreInfo,
with the request id in the query string. See Error codes for
the response shape and the list of every code.