Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "rkv_remove_columns" not found or invalid function name in /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/class-wp-hook.php:326 Stack trace: #0 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/plugin.php(205): WP_Hook->apply_filters('', Array) #1 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-content/plugins/wordpress-seo/src/presenters/meta-description-presenter.php(59): apply_filters('wpseo_metadesc', '', Object(Yoast\WP\SEO\Presentations\Indexable_Post_Type_Presentation)) #2 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-content/plugins/wordpress-seo/src/presenters/abstract-indexable-tag-presenter.php(37): Yoast\WP\SEO\Presenters\Meta_Description_Presenter->get() #3 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-content/plugins/wordpress-seo/src/presenters/meta-description-presenter.php(25): Yoast\WP\SEO\Presenters\Abstract_Indexable_Tag_Presenter->present() #4 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-content/plugins/wordpress-seo/src/integrations/front-end-integration.php(419): Yoast\WP\SEO\Presenters\Meta_Description_Presenter->present() #5 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/class-wp-hook.php(324): Yoast\WP\SEO\Integrations\Front_End_Integration->present_head('') #6 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #7 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #8 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-content/plugins/wordpress-seo/src/integrations/front-end-integration.php(390): do_action('wpseo_head') #9 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/class-wp-hook.php(324): Yoast\WP\SEO\Integrations\Front_End_Integration->call_wpseo_head('') #10 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #11 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #12 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/general-template.php(3192): do_action('wp_head') #13 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-content/themes/tank/header.php(704): wp_head() #14 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/template.php(810): require_once('/var/www/sanpul...') #15 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/template.php(745): load_template('/var/www/sanpul...', true, Array) #16 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/general-template.php(48): locate_template(Array, true, true, Array) #17 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-content/themes/tank/single.php(1): get_header() #18 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/template-loader.php(106): include('/var/www/sanpul...') #19 /var/www/sanpul/data/www/emkosti-vrn.ru/wp-blog-header.php(19): require_once('/var/www/sanpul...') #20 /var/www/sanpul/data/www/emkosti-vrn.ru/index.php(17): require('/var/www/sanpul...') #21 {main} thrown in /var/www/sanpul/data/www/emkosti-vrn.ru/wp-includes/class-wp-hook.php on line 326