Mutiple package shipment labels stopped working

Hi,

there seems to be an issue with the multiple shipment function. We couldn’t create labels for multiple package shipments anymore. Here is the error message:

2021-11-27T13:45:10+00:00 CRITICAL Uncaught Error: Call to undefined function get_magic_quotes_runtime() in /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/lib/PDFMerger/fpdf/fpdf.php:1047
Stack trace:
#0 /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/lib/PDFMerger/fpdf/fpdf.php(81): FPDF->_dochecks()
#1 /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/lib/PDFMerger/PDFMerger.php(80): FPDF->__construct()
#2 /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/includes/pr-dhl-api/class-pr-dhl-api-soap-label.php(222): PR_DHL\lib\PDFMerger\PDFMerger->merge()
#3 /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/includes/pr-dhl-api/class-pr-dhl-api-soap-label.php(126): PR_DHL_API_SOAP_Label->save_multiple_files()
#4 /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/includes/pr-dhl-api/class-pr-dhl-api-soap-label.php(75): PR_DHL_API_SOAP_Label->process_label_response()
#5 /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/includes/pr-dhl-api/abstract-pr-dhl-api.php(37): PR_DHL_API_SOAP_Label->get_dhl_label()
#6 /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/includes/pr-dhl-api/class-pr-dhl-api-paket.php(48): PR_DHL_API->get_dhl_label()
#7 /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/includes/abstract-pr-dhl-wc-order.php(256): PR_DHL_API_Paket->get_dhl_label()
#8 /var/customers/webs/shop/gwlshop/wp-includes/class-wp-hook.php(303): PR_DHL_WC_Order->save_meta_box_ajax()
#9 /var/customers/webs/shop/gwlshop/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()
#10 /var/customers/webs/shop/gwlshop/wp-includes/plugin.php(470): WP_Hook->do_action()
#11 /var/customers/webs/shop/gwlshop/wp-admin/admin-ajax.php(187): do_action()
#12 {main}
  thrown in /var/customers/webs/shop/gwlshop/wp-content/plugins/dhl-for-woocommerce/lib/PDFMerger/fpdf/fpdf.php in Zeile 1047

When we press the button “create label” it starts loading but it never stops loading.
There is also no error message it just does not stop loading.