Warning: Attempt to read property "name" on null in /var/www/html/public/wp-content/themes/bestwh/inc/hooks/shortcodes/old-shortcodes.php on line 35

Fatal error: Uncaught TypeError: htmlspecialchars(): Argument #1 ($string) must be of type string, WP_Error given in /var/www/html/public/wp-content/themes/bestwh/inc/utils/HTML.php:187 Stack trace: #0 /var/www/html/public/wp-content/themes/bestwh/inc/utils/HTML.php(187): htmlspecialchars() #1 /var/www/html/public/wp-content/themes/bestwh/inc/utils/HTML.php(158): utils\HTML::encode() #2 /var/www/html/public/wp-content/themes/bestwh/inc/utils/HTML.php(312): utils\HTML::renderTagAttributes() #3 /var/www/html/public/wp-content/themes/bestwh/inc/hooks/shortcodes/old-shortcodes.php(35): utils\HTML::tag() #4 /var/www/html/public/wp-includes/shortcodes.php(355): utils\Script::{closure}() #5 [internal function]: do_shortcode_tag() #6 /var/www/html/public/wp-includes/shortcodes.php(227): preg_replace_callback() #7 /var/www/html/public/wp-includes/class-wp-hook.php(308): do_shortcode() #8 /var/www/html/public/wp-includes/plugin.php(205): WP_Hook->apply_filters() #9 /var/www/html/public/wp-content/themes/bestwh/page-templates/controllers/single-how-to_old.php(17): apply_filters() #10 /var/www/html/public/wp-includes/template.php(785): require('...') #11 /var/www/html/public/wp-includes/template.php(718): load_template() #12 /var/www/html/public/wp-includes/general-template.php(204): locate_template() #13 /var/www/html/public/wp-content/themes/bestwh/single-how-to.php(11): get_template_part() #14 /var/www/html/public/wp-includes/template-loader.php(106): include('...') #15 /var/www/html/public/wp-blog-header.php(19): require_once('...') #16 /var/www/html/public/index.php(17): require('...') #17 /var/www/html/public/cache-index.php(9): require('...') #18 [internal function]: {closure}() #19 /var/www/html/public/wp-content/themes/bestwh/inc/components/PageCache.php(58): call_user_func() #20 /var/www/html/public/cache-index.php(10): components\PageCache::handle() #21 {main} thrown in /var/www/html/public/wp-content/themes/bestwh/inc/utils/HTML.php on line 187