Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function "custom_search_filter" not found or invalid function name in /home/liamar9/public_html/wp-includes/class-wp-hook.php:324 Stack trace: #0 /home/liamar9/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters('', Array) #1 /home/liamar9/public_html/wp-includes/plugin.php(565): WP_Hook->do_action(Array) #2 /home/liamar9/public_html/wp-includes/class-wp-query.php(1881): do_action_ref_array('pre_get_posts', Array) #3 /home/liamar9/public_html/wp-includes/class-wp-query.php(3824): WP_Query->get_posts() #4 /home/liamar9/public_html/wp-includes/post.php(2520): WP_Query->query(Array) #5 /home/liamar9/public_html/wp-content/plugins/wpcode-premium/includes/pro/class-wpcode-custom-shortcode.php(113): get_posts(Array) #6 /home/liamar9/public_html/wp-content/plugins/wpcode-premium/includes/pro/class-wpcode-custom-shortcode.php(97): WPCode_Custom_Shortcode->gather_shortcodes() #7 /home/liamar9/public_html/wp-content/plugins/wpcode-premium/includes/pro/class-wpcode-custom-shortcode.php(37): WPCode_Custom_Shortcode->get_custom_shortcodes() #8 /home/liamar9/public_html/wp-includes/class-wp-hook.php(324): WPCode_Custom_Shortcode->add_shortcodes('') #9 /home/liamar9/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #10 /home/liamar9/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #11 /home/liamar9/public_html/wp-settings.php(695): do_action('init') #12 /home/liamar9/public_html/wp-config.php(110): require_once('/home/liamar9/p...') #13 /home/liamar9/public_html/wp-load.php(50): require_once('/home/liamar9/p...') #14 /home/liamar9/public_html/wp-blog-header.php(13): require_once('/home/liamar9/p...') #15 /home/liamar9/public_html/index.php(17): require('/home/liamar9/p...') #16 {main} thrown in /home/liamar9/public_html/wp-includes/class-wp-hook.php on line 324