[ad_1] Fatal error: WPO\WC\PDF_Invoices\Documents\Order_Document::get_header_logo_id(): Return value must be of type int, null returned/srv/http/example.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document.php (830)#0 /srv/http/example.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document.php(848):…