【ポケカ】クワガノンVが高すぎる！！プロモでもないのになぜここまで高騰してるの・・・？

Fatal error: Uncaught Error: Call to undefined function get_field() in /home/tsukudani/rocket-dan.com/public_html/wp-content/themes/swell_child/functions.php:58 Stack trace: #0 /home/tsukudani/rocket-dan.com/public_html/wp-includes/shortcodes.php(433): get_card_info(Array, '', 'card_info') #1 [internal function]: do_shortcode_tag(Array) #2 /home/tsukudani/rocket-dan.com/public_html/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(card_i...', 'do_shortcode_ta...', '<p>\xE3\x82\xAF\xE3\x83\xAF\xE3\x82\xAC\xE3\x83\x8E...') #3 /home/tsukudani/rocket-dan.com/public_html/wp-includes/class-wp-hook.php(324): do_shortcode('<p>\xE3\x82\xAF\xE3\x83\xAF\xE3\x82\xAC\xE3\x83\x8E...') #4 /home/tsukudani/rocket-dan.com/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('<p>\xE3\x82\xAF\xE3\x83\xAF\xE3\x82\xAC\xE3\x83\x8E...', Array) #5 /home/tsukudani/rocket-dan.com/public_html/wp-includes/post-template.php(256): apply_filters('the_content', '\xE3\x82\xAF\xE3\x83\xAF\xE3\x82\xAC\xE3\x83\x8E\xE3\x83\xB3...') in /home/tsukudani/rocket-dan.com/public_html/wp-content/themes/swell_child/functions.php on line 58