Array
(
    [Errors] => Array
        (
            [0] => Array
                (
                    [Receiver] => 
                    [Category] => Application
                    [Domain] => PLATFORM
                    [ErrorID] => 520003
                    [ExceptionID] => 
                    [Message] => Authentication failed. API credentials are incorrect.
                    [Parameter] => 
                    [Severity] => Error
                    [Subdomain] => Application
                )

        )

    [Ack] => Failure
    [Build] => apapiserv-0.60.0_20260129211705369
    [CorrelationID] => a766b6d30c7b3
    [Timestamp] => 2026-02-14T20:28:50.792-08:00
    [PreapprovalKey] => 
    [RedirectURL] => 
    [XMLRequest] => ReturnAllen_UShttps://ppcp.angellops.com/cancel.phpAPP-80W284485P519543T216.73.216.80USD2027-02-14http://sandbox.angelleye.com/paypal/ipn/ipn-listener.phphttps://ppcp.angellops.com/return.php2026-02-14
    [XMLResponse] => 2026-02-14T20:28:50.792-08:00Failurea766b6d30c7b3apapiserv-0.60.0_20260129211705369520003PLATFORMApplicationErrorApplicationAuthentication failed. API credentials are incorrect.
)


Warning:  Cannot modify header information - headers already sent by (output started at /home/huckangell/angellops/ppcp/src/angelleye/PayPal/PayPal.php:85) in /home/huckangell/angellops/ppcp/samples/classic/Preapproval.php on line 69