Hooks not working

Hi
hooks don’t work on my website:

aioseop_title, aioseop_description, aioseop_keywords

even if i leave the hooks empty and return any string they don’t work
insertion via WPCode also does not work

check the code below

// define the aioseop_title callback 
add_action('aioseop_title', 'change_wordpress_seo_title');
function change_wordpress_seo_title($title)
{
    return 123456789;

    global $post;
    $options_themes = get_option('flamix_theme_options');
    /* $desc = preg_replace("#<$tg.*?>|</$tg>#i", "", get_field( 'product_description', $post->ID)); */
    $desc = strip_tags(get_field('product_description', $post->ID));
    $desc = str_replace(array("\r\n", "\r", "\n", "\t", '  ', '    ', '    '), '', $desc);
    if (empty($title) || strcasecmp($title, get_the_title()) == 0) {
        preg_match_all("|%(.*)%|U", $options_themes['title'], $matches);
        if (in_array("title", $matches[1]) && in_array("desc", $matches[1])) {
            $title = str_replace("%title%", get_the_title(), $options_themes['title']);
            $title = str_replace("%desc%", $desc, $title);
        } elseif (in_array("title", $matches[1]))
            $title = str_replace("%title%", get_the_title(), $options_themes['title']);

        elseif (in_array("desc", $matches[1]))
            $title = str_replace("%desc%", $desc, $options_themes['title']);

        elseif (!$options_themes['title'] || empty($options_themes['title']))
            $title = get_the_title();
        else
            $title = $options_themes['title'];
    }
    return $title;
}

add_filter('aioseop_description', 'filter_aioseop_description', 10, 1);
function filter_aioseop_description($aioseop_description)
{
    global $post;

    if (empty($aioseop_description) || !$aioseop_description) {
        $options_themes = get_option('flamix_theme_options');
        /* $desc = preg_replace("#<$tg.*?>|</$tg>#i", "", get_field( 'product_description', $post->ID)); */
        $desc = strip_tags(get_field('product_description', $post->ID));
        $desc = str_replace(array("\r\n", "\r", "\n", "\t", '  ', '    ', '    '), '', $desc);

        preg_match_all("|%(.*)%|U", $options_themes['desc'], $matches);
        if (in_array("title", $matches[1]) && in_array("desc", $matches[1])) {
            $aioseop_description = str_replace("%title%", get_the_title(), $options_themes['desc']);
            $aioseop_description = str_replace("%desc%", $desc, $aioseop_description);
        } elseif (in_array("title", $matches[1]))
            $aioseop_description = str_replace("%title%", get_the_title(), $options_themes['desc']);

        elseif (in_array("desc", $matches[1]))
            $aioseop_description = str_replace("%desc%", $desc, $options_themes['desc']);

        else
            $aioseop_description = $options_themes['desc'];
    }


    return $aioseop_description;
};


add_filter('aioseop_keywords', 'filter_aioseop_keywords', 10, 1);
function filter_aioseop_keywords($aioseop_keywords)
{
    global $post;
    $options_themes = get_option('flamix_theme_options');
    $desc = preg_replace("#<$tg.*?>|</$tg>#i", "", get_field('product_description', $post->ID));
    $desc = str_replace(array("\r\n", "\r", "\n", "\t", '  ', '    ', '    '), '', $desc);
    if (empty($aioseop_keywords) || !$aioseop_keywords) {
        preg_match_all("|%(.*)%|U", $options_themes['keywords'], $matches);

        if (in_array("title", $matches[1]) && in_array("desc", $matches[1])) {
            $aioseop_keywords = str_replace("%title%", get_the_title(), $options_themes['keywords']);
            $aioseop_keywords = str_replace("%desc%", $desc, $aioseop_keywords);
        } elseif (in_array("title", $matches[1]))
            $aioseop_keywords = str_replace("%title%", get_the_title(), $options_themes['keywords']);

        elseif (in_array("desc", $matches[1]))
            $aioseop_keywords = str_replace("%desc%", $desc, $options_themes['keywords']);

        else
            $aioseop_keywords = $options_themes['keywords'];
    }

    return $aioseop_keywords;
};

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