Critical error

Dear support,

This morning I refund an item from a recent order.

I believe that after this operation, the plugin shortcode started giving this critical error:

Fatal error: Uncaught Error: Call to undefined method Automattic\WooCommerce\Admin\Overrides\OrderRefund::get_billing_first_name() in /home/sito/public_html/wp-content/plugins/recently-purchased-products-for-woo/includes/class-rppw-public.php:293 Stack trace: #0 /home/sito/public_html/wp-includes/shortcodes.php(433): RPPW_Public->rppw_get_recently_purchased_products_slider() #1 [internal function]: do_shortcode_tag() #2 /home/sito/public_html/wp-includes/shortcodes.php(273): preg_replace_callback() #3 /home/sito/public_html/wp-content/plugins/total-theme-core/inc/wpbakery/templates/vcex_shortcode.php(47): do_shortcode() #4 /home/sito/public_html/wp-content/plugins/total-theme-core/inc/wpbakery/shortcodes/shortcode.php(36): include('/home/sito/...') #5 /home/sito/public_html/wp-includes/shortcodes.php(433): VCEX_Shortcode->output() #6 [internal function]: do_shortcode_tag() #7 /home/sito/public_html/wp-includes/shortcodes.php(273): preg_replace_callback() #8 /home/sito/public_html/wp-content/plugins/js_composer/include/helpers/helpers.php(246): do_shortcode() #9 /home/sito/public_html/wp-content/themes/Total/vc_templates/vc_column.php(92): wpb_js_remove_wpautop() #10 /home/sito/public_html/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(451): require('/home/sito/...') #11 /home/sito/public_html/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(424): WPBakeryShortCode->loadTemplate() #12 /home/sito/public_html/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(546): WPBakeryShortCode->content() #13 /home/sito/public_html/wp-content/plugins/js_composer/include/helpers/helpers.php(1299): WPBakeryShortCode->output() #14 /home/sito/public_html/wp-includes/shortcodes.php(433): vc_do_shortcode() #15 [internal function]: do_shortcode_tag() #16 /home/sito/public_html/wp-includes/shortcodes.php(273): preg_replace_callback() #17 /home/sito/public_html/wp-content/plugins/js_composer/include/helpers/helpers.php(246): do_shortcode() #18 /home/sito/public_html/wp-content/themes/Total/vc_templates/vc_row.php(168): wpb_js_remove_wpautop() #19 /home/sito/public_html/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(451): require('/home/sito/...') #20 /home/sito/public_html/wp-content/plugins/js_composer/include/classes/shortcodes/vc-row.php(40): WPBakeryShortCode->loadTemplate() #21 /home/sito/public_html/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(546): WPBakeryShortCode_Vc_Row->content() #22 /home/sito/public_html/wp-content/plugins/js_composer/include/helpers/helpers.php(1299): WPBakeryShortCode->output() #23 /home/sito/public_html/wp-includes/shortcodes.php(433): vc_do_shortcode() #24 [internal function]: do_shortcode_tag() #25 /home/sito/public_html/wp-includes/shortcodes.php(273): preg_replace_callback() #26 /home/sito/public_html/wp-includes/class-wp-hook.php(324): do_shortcode() #27 /home/sito/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters() #28 /home/sito/public_html/wp-includes/post-template.php(256): apply_filters() #29 /home/sito/public_html/wp-content/themes/Total/partials/page-single-content.php(14): the_content() #30 /home/sito/public_html/wp-includes/template.php(812): require('/home/sito/...') #31 /home/sito/public_html/wp-includes/template.php(745): load_template() #32 /home/sito/public_html/wp-includes/general-template.php(206): locate_template() #33 /home/sito/public_html/wp-content/themes/Total/partials/page-single-layout.php(47): get_template_part() #34 /home/sito/public_html/wp-includes/template.php(812): require('/home/sito/...') #35 /home/sito/public_html/wp-includes/template.php(745): load_template() #36 /home/sito/public_html/wp-includes/general-template.php(206): locate_template() #37 /home/sito/public_html/wp-content/themes/Total/framework/functions/template-parts.php(127): get_template_part() #38 /home/sito/public_html/wp-content/themes/Total/page.php(35): wpex_get_template_part() #39 /home/sito/public_html/wp-includes/template-loader.php(106): include('/home/sito/...') #40 /home/sito/public_html/wp-blog-header.php(19): require_once('/home/sito/...') #41 /home/sito/public_html/index.php(17): require('/home/sito/...') #42 {main} thrown in /home/sito/public_html/wp-content/plugins/recently-purchased-products-for-woo/includes/class-rppw-public.php on line 293