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Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, first array member is not a valid class name or object in /var/www/sulakauri.ge/public/wordpress/wp-includes/class-wp-hook.php:324 Stack trace: #0 /var/www/sulakauri.ge/public/wordpress/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters() #1 /var/www/sulakauri.ge/public/wordpress/wp-includes/plugin.php(517): WP_Hook->do_action() #2 /var/www/sulakauri.ge/public/themes/khe/woocommerce/content-product.php(43): do_action() #3 /var/www/sulakauri.ge/public/wordpress/wp-includes/template.php(812): require('...') #4 /var/www/sulakauri.ge/public/plugins/woocommerce/includes/wc-core-functions.php(285): load_template() #5 /var/www/sulakauri.ge/public/themes/khe/taxonomy-authors.php(83): wc_get_template_part() #6 /var/www/sulakauri.ge/public/wordpress/wp-includes/template-loader.php(106): include('...') #7 /var/www/sulakauri.ge/public/wordpress/wp-blog-header.php(19): require_once('...') #8 /var/www/sulakauri.ge/public/index.php(5): require('...') #9 {main} thrown in /var/www/sulakauri.ge/public/wordpress/wp-includes/class-wp-hook.php on line 324