BabyFaceのバックステップを取り付け

Fatal error: Uncaught TypeError: Unsupported operand types: string - int in /home/buchi/cb-custom.xyz/public_html/wp-content/plugins/pz-hatenablogcard/pz-hatenablogcard.php:438 Stack trace: #0 /home/buchi/cb-custom.xyz/public_html/wp-includes/shortcodes.php(433): Pz_HatenaBlogCard->Pz_HatenaBlogCard_ShortCode(Array, '', 'blogcard') #1 [internal function]: do_shortcode_tag(Array) #2 /home/buchi/cb-custom.xyz/public_html/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(blogca...', 'do_shortcode_ta...', '<p>\xE3\x82\xBB\xE3\x83\x91\xE3\x83\x8F\xE3\x83\xB3...') #3 /home/buchi/cb-custom.xyz/public_html/wp-includes/class-wp-hook.php(324): do_shortcode('<p>\xE3\x82\xBB\xE3\x83\x91\xE3\x83\x8F\xE3\x83\xB3...') #4 /home/buchi/cb-custom.xyz/public_html/wp-includes/plugin.php(205): WP_Hook->apply_filters('<p>\xE3\x82\xBB\xE3\x83\x91\xE3\x83\x8F\xE3\x83\xB3...', Array) #5 /home/buchi/cb-custom.xyz/public_html/wp-includes/post-template.php(256): apply_filters('the_content', '<p>\xE3\x82\xBB\xE3\x83\x91\xE3\x83\x8F\xE3\x83\xB3...') #6 /home/buchi/cb-custom.xyz/public_html/wp-content/themes/stinger5ver20150505/single.php(43): the_content() #7 /home/buchi/cb-custom.xyz/public_html/wp-includes/template-loader.php(106): include('/home/buchi/cb-...') #8 /home/buchi/cb-custom.xyz/public_html/wp-blog-header.php(19): require_once('/home/buchi/cb-...') #9 /home/buchi/cb-custom.xyz/public_html/index.php(17): require('/home/buchi/cb-...') #10 {main} thrown in /home/buchi/cb-custom.xyz/public_html/wp-content/plugins/pz-hatenablogcard/pz-hatenablogcard.php on line 438