Codeigniter, Severity: error --> Exception: Too few arguments to function, admin dashboard shows HTTP error 500

php function codeigniter model-view-controller

PHP Snippet 1:

function get_pending_dash() 
{
    $where = "status = '1' AND type = '2'";
    return $this->db->where($where)->order_by('id', 'DESC')->limit(20)->get("transactions");
}