Error Generating Invoice PDF in WooCommerce PDF Invoices & Packing Slips

Hello,

I am encountering an issue with the WooCommerce PDF Invoices & Packing Slips plugin on my website https://anyelu.es/. When attempting to generate a PDF invoice for an order, I am faced with the following fatal error:

Fatal error: Call to a member function custom_field() on null
/home/customer/www/anyelu.es/public_html/wp-content/plugins/correos-oficial/src/Infrastructure/Common/Shipping/DniRequired.php (127)
#0 /home/customer/www/anyelu.es/public_html/wp-includes/class-wp-hook.php(326): include_nif_in_invoice('M\xC3\xB3nica Nuez \xC3\x81...')
#1 /home/customer/www/anyelu.es/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('M\xC3\xB3nica Nuez \xC3\x81...', Array)
#2 /home/customer/www/anyelu.es/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document-methods.php(93): apply_filters('wpo_wcpdf_billi...', 'M\xC3\xB3nica Nuez \xC3\x81...', Object(WPO\WC\PDF_Invoices\Documents\Invoice))
#3 /home/customer/www/anyelu.es/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document-methods.php(102): WPO\WC\PDF_Invoices\Documents\Order_Document_Methods->get_billing_address()
#4 /home/customer/www/anyelu.es/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/templates/Simple/invoice.php(42): WPO\WC\PDF_Invoices\Documents\Order_Document_Methods->billing_address()
#5 /home/customer/www/anyelu.es/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document.php(1138): include('/home/customer/...')
#6 /home/customer/www/anyelu.es/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document.php(982): WPO\WC\PDF_Invoices\Documents\Order_Document->render_template('/home/customer/...', Array)
#7 /home/customer/www/anyelu.es/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document.php(937): WPO\WC\PDF_Invoices\Documents\Order_Document->get_html()
#8 /home/customer/www/anyelu.es/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/documents/abstract-wcpdf-order-document.php(1004): WPO\WC\PDF_Invoices\Documents\Order_Document->get_pdf()
#9 /home/customer/www/anyelu.es/public_html/wp-content/plugins/woocommerce-pdf-invoices-packing-slips/includes/class-wcpdf-main.php(518): WPO\WC\PDF_Invoices\Documents\Order_Document->output_pdf('inline')
#10 /home/customer/www/anyelu.es/public_html/wp-includes/class-wp-hook.php(324): WPO\WC\PDF_Invoices\Main->generate_document_ajax('')
#11 /home/customer/www/anyelu.es/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array)
#12 /home/customer/www/anyelu.es/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#13 /home/customer/www/anyelu.es/public_html/wp-admin/admin-ajax.php(188): do_action('wp_ajax_generat...')
#14 {main}

This error specifically occurs when trying to view or download invoices in PDF format. Below are the relevant details of the error and the actions leading up to it:

• Website Environment:
  • WordPress Version: 6.4.1
  • WooCommerce Version: 8.3.0
  • WooCommerce PDF Invoices & Packing Slips Plugin Version: 3.7.3

Given this issue, I am currently unable to provide PDF invoices to my customers, which is a critical functionality for my business. I would appreciate any assistance or guidance in resolving this issue as soon as possible.

Could you please provide me with a solution or suggestion to address this error?

Thank you for your attention. I look forward to your prompt response.

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