Reference
PAYPAL_WEBHOOK_NOT_REGISTERED
PayPal connection has no webhook
PayPal connection has no webhook
HTTP status 400 Bad Request, code PAYPAL_WEBHOOK_NOT_REGISTERED.
What it means#
A PayPal delivery arrived for a connection with no webhook subscription id, so its signature cannot be checked. It was not stored.
What to do#
Connect the PayPal REST app again with POST /payment-providers/paypal; webhookRegistrationError says why the subscription could not be made.
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.