Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method BsWp::add_slug_to_body_class() cannot be called statically in /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-includes/class-wp-hook.php:326 Stack trace: #0 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-includes/plugin.php(205): WP_Hook->apply_filters(Array, Array) #1 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-includes/post-template.php(866): apply_filters('body_class', Array, Array) #2 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-includes/post-template.php(622): get_body_class(Array) #3 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-content/themes/kynos-boostrap/parts/shared/html-header.php(34): body_class() #4 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-includes/template.php(812): require('/home/kynos/kyn...') #5 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-includes/template.php(745): load_template('/home/kynos/kyn...', false, Array) #6 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-includes/general-template.php(206): locate_template(Array, true, false, Array) #7 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-content/themes/kynos-boostrap/external/bootstrap-utilities.php(44): get_template_part('parts/shared/ht...') #8 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-content/themes/kynos-boostrap/page-member.php(9): BsWp->get_template_parts(Array) #9 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-includes/template-loader.php(106): include('/home/kynos/kyn...') #10 /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-blog-header.php(19): require_once('/home/kynos/kyn...') #11 /home/kynos/kynos.co.jp/public_html/renewal_2022/index.php(17): require('/home/kynos/kyn...') #12 {main} thrown in /home/kynos/kynos.co.jp/public_html/renewal_2022/wp-includes/class-wp-hook.php on line 326