Hi,
Thank you for your reply.
I still have the same problem.
I copied swift-framework.php to my child theme and put it in subfolder /swift-framework/.
I then removed line 51 in swift-framework.php (//include_once(SF_FRAMEWORK_PATH . '/sf-woocommerce.php');
I then added the following lines to my child theme’s functions.php
require_once(get_stylesheet_directory() . '/swift-framework/swift-framework.php');
require_once( get_stylesheet_directory() . '/swift-framework/sf-woocommerce.php' );
But I still get a blank page on front end.