Removed SERVER BEHAVIOR require_once( "webassist/security_assist/helper_php.php" ) fromcheckout.php, confirm.php, and confirm_cart.php pages. Site works and got to PayPal - https://www.paypal.com/webapps/hermes?incontext=0&token=EC-7YY22891V46616608&version=1.4#/checkout/review
Payment failed so will dig into PayPal. Thanks again for your great service.
UPDATE
Removed SERVER BEHAVIOR require_once( "webassist/security_assist/helper_php.php" ) fromPP_confirm.php, and the PayPal processed - I paid myself (personal Paypal account to business Paypal account).Got an email from Paypal to payee and payor
However, did not connect with download page. Paid this guy but did not get my digital product!
Should I delete SERVER BEHAVIOR require_once( "webassist/security_assist/helper_php.php" ) from all pages?