Error download all invoices

Hi,

I have a plugin to download all invoices in one click but since some days ago I’ve found this error. I hope you know how to fix it.

Fatal error: Call to a member function get_formatted_billing_address() on null
/home/pruebaslibresdie/curso.superavitformacion.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document-methods.php (111)
#0 /home/pruebaslibresdie/curso.superavitformacion.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document-methods.php(122): WPO\WC\PDF_Invoices\Documents\Order_Document_Methods->get_billing_address()
#1 /home/pruebaslibresdie/curso.superavitformacion.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/templates/Simple/invoice.php(42): WPO\WC\PDF_Invoices\Documents\Order_Document_Methods->billing_address()
#2 /home/pruebaslibresdie/curso.superavitformacion.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document.php(919): include('/home/pruebasli...')
#3 /home/pruebaslibresdie/curso.superavitformacion.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document.php(820): WPO\WC\PDF_Invoices\Documents\Order_Document->render_template('/home/pruebasli...', Array)
#4 /home/pruebaslibresdie/curso.superavitformacion.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/class-wcpdf-bulk-document.php(92): WPO\WC\PDF_Invoices\Documents\Order_Document->get_html(Array)
#5 /home/pruebaslibresdie/curso.superavitformacion.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/class-wcpdf-bulk-document.php(61): WPO\WC\PDF_Invoices\Documents\Bulk_Document->get_html()
#6 /home/pruebaslibresdie/curso.superavitformacion.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/class-wcpdf-bulk-document.php(116): WPO\WC\PDF_Invoices\Documents\Bulk_Document->get_pdf()
#7 /home/pruebaslibresdie/curso.superavitformacion.com/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/class-wcpdf-main.php(392): WPO\WC\PDF_Invoices\Documents\Bulk_Document->output_pdf('download')
#8 /home/pruebaslibresdie/curso.superavitformacion.com/wp-includes/class-wp-hook.php(307): WPO\WC\PDF_Invoices\Main->generate_pdf_ajax('')
#9 /home/pruebaslibresdie/curso.superavitformacion.com/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters('', Array)
#10 /home/pruebaslibresdie/curso.superavitformacion.com/wp-includes/plugin.php(476): WP_Hook->do_action(Array)
#11 /home/pruebaslibresdie/curso.superavitformacion.com/wp-admin/admin-ajax.php(187): do_action('wp_ajax_generat...')
#12 {main}

Thanks.
Carlos.