The upload path does not appear to be valid.

Hi,

I am trying to upload a file on live server cPanel but it not uploading and i am getting the error 

Code:

The upload path does not appear to be valid.

and some time 500-internal server error

But the thing is same code is running on my local machine wamp and every thing is perfect. I give full permissions to the upload folder and upload folder is on root where index.php is there

Controller:

PHP Code:

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Careers extends CI_Controller {
    
     function __construct(){
        parent::__construct();
        $this->load->library(array('upload','session','javascript','encrypt','email','form_validation'));
    $this->load->helper(array('form','text','html','url','email','lang','file','directory')); 
        $this->load->driver(array('session'));
    $this->load->model('Careers_model','model');
    }
    
    public function index($lang=false)
    {
        $vars['lang'] =langhomename($lang);
        $langid=langhomeid($lang);
        $this->load->view('careers/index',$vars);
    }
    
    public function cvcareers($lang=false){  
        $vars['lang'] =langhomename($lang);
        $langid=langhomeid($lang);
            $this->model->cvcareers($vars);
      }
   
} 


Model:

PHP Code:

<?php
class Careers_model extends CI_Model {

    public function __construct(){
        $this->load->database(); 
        }
        
    public function cvcareers($vars){
        
        //getting values from the submitted form
        $designation = $_POST['career-designation'];
        $email = $_POST['career-email'];
            $name = $_POST['career-name'];
        $number = $_POST['career-number'];
            $msg = $_POST['career-msg'];    
        $cvdata = '';
        
        //Uploading file to the directory
        $config['upload_path']          = './uploads/';
                $config['allowed_types']        = 'gif|jpg|png';
                $config['max_size']             = 1000;

                $this->load->library('upload', $config);
        if (!$this->upload->do_upload('userfile'))
        {        
             $vars['cv_status']= array('error' => $this->upload->display_errors());
             print_r($vars);
             echo 'Uploaderror';
        }
        else
        {
            $cvdata= $this->upload->data();
            //assiging form data in array to pass to the database function
            $data = array(
                    'designation' => $designation,
                    'email' =>$email,
                    'name'=>$name,
                    'number'=>$number,
                    'message'=>$msg,
                    'path'=>$config['upload_path'],
                    //'cv' =>$cvdata['file_name'],
                    'cv' =>'filename',
                );
            //Inserting data into the database
            $this->db->insert('careers', $data);
            //Genrating email for sending,
            $mailconfig['protocol'] = 'smtp';
            $mailconfig['smtp_host'] = 'ssl://smtp.gmail.com'; //change this
            $mailconfig['smtp_port'] = '465';
            $mailconfig['smtp_user'] = '@gmail.com'; //change this
            $mailconfig['smtp_pass'] = ''; //change this
            $mailconfig['mailtype'] = 'html';
            $mailconfig['charset'] = 'iso-8859-1';
            $mailconfig['wordwrap'] = TRUE;
            $mailconfig['newline'] = "\r\n";
            $this->load->library('email',$mailconfig);
            $subject="CV";
            //Genrating email template by entered user data 
            $message =message($designation,$email,$name,$number,$msg,$cvdata);
            
            //attaching file with the email 
            $this->email->attach($cvdata["full_path"]);
            $this->email->set_newline("\r\n");
            $this->email->set_mailtype("html");
            $this->email->from('@gmail.com');
            $this->email->to('@gmail.com');
            $this->email->subject($subject);
            $this->email->message($message);

            if($this->email->send())
            {
            echo 'Emailsent';
            }
            else
            {
            //show_error($this->email->print_debugger());
                $emailerror=$this->email->print_debugger();
            }
        }

    }    
    


    
} 


.htaccess

PHP Code:

RewriteEngine on
Options -Indexes
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule .* index.php/$1 [L]
RewriteCond %{HTTP_HOST} ^sitename\.com$ [NC]
RewriteRule ^(.*)$ http://www.sitename.com/$1 [R=301,L]
Header add Access-Control-Allow-Origin "*"
Header add Access-Control-Allow-Headers "origin, x-requested-with, content-type"
Header add Access-Control-Allow-Methods "PUT, GET, POST, DELETE, OPTIONS"