访问upload_form时，codeigniter禁止访问

I am a student n just started using codeigniter to develop a website using codeigniter 3.1.6 and xampp

I got forbidden access error when accessing upload_form.php

here's my apache config

<Directory "C:/xampp/htdocs">
    #
    # Possible values for the Options directive are "None", "All",
    # or any combination of:
    #   Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
    #
    # Note that "MultiViews" must be named *explicitly* --- "Options All"
    # doesn't give it to you.
    #
    # The Options directive is both complicated and important.  Please see
    # http://httpd.apache.org/docs/2.4/mod/core.html#options
    # for more information.
    #
    Options Indexes FollowSymLinks Includes ExecCGI

    #
    # AllowOverride controls what directives may be placed in .htaccess files.


    # It can be "All", "None", or any combination of the keywords:
    #   AllowOverride FileInfo AuthConfig Limit
    #
    AllowOverride All

    #
    # Controls who can get stuff from this server.
    #
    Require all granted
</Directory>

here's my code main.php in application/views

<nav class="w3-sidebar w3-red w3-collapse w3-top w3-large w3-padding" style="z-index:3;width:300px;font-weight:bold;" id="mySidebar"><br>
  <a href="javascript:void(0)" onclick="w3_close()" class="w3-button w3-hide-large w3-display-topleft" style="width:100%;font-size:22px">Close Menu</a>
  <div class="w3-container">
    <a href="application/views/upload_form.php"><h3 class="w3-padding-64"><b>Arnold<br>Cells</b></h3></a>
  </div>

upload_form.php in application/views

<html>
<head>
<title>Upload Form</title>
</head>
<body>

<?php echo $error;?>

<?php echo form_open_multipart('upload/do_upload');?>

<input type="file" name="userfile" size="20" />

<br /><br />

<input type="submit" value="upload" />

</form>

</body>
</html>

upload.php in application/controllers

class Upload extends CI_Controller {

        public function __construct()
        {
                parent::__construct();
                $this->load->helper(array('form', 'url'));
        }

        public function index()
        {
                $this->load->view('upload_form', array('error' => ' ' ));
        }

        public function do_upload()
        {
                $config['upload_path']          = './uploads/';
                $config['allowed_types']        = 'gif|jpg|png';
                $config['max_size']             = 100;
                $config['max_width']            = 1024;
                $config['max_height']           = 768;

                $this->load->library('upload', $config);

                if ( ! $this->upload->do_upload('userfile'))
                {
                        $error = array('error' => $this->upload->display_errors());

                        $this->load->view('upload_form', $error);
                }
                else
                {
                        $data = array('upload_data' => $this->upload->data());

                        $this->load->view('upload_success', $data);
                }
        }
}
?>

can someone help me to fix this, please ? Thank you

In case the Hayk's answer or Tpojka's comment are not clear you should change this line in main.php

<a href="application/views/upload_form.php"><h3 class="w3-padding-64"><b>Arnold<br>Cells</b></h3></a>

<a href="<?php echo base_url("upload/index");?>"><h3 class="w3-padding-64"><b>Arnold<br>Cells</b></h3></a>

This will make the link open the upload form.

The error is because the "application/views/" folder cannot be access directly by way of a browser request.

Probably you shouldn't load your views with direct link to it,
they should be loaded from specific controller/action. As i see you have already action which are loading your upload_form view
so you can replace href of your a tag to action which are loading the view, inthis example will be like

<?=base_url()."upload/index";?>

and be sure 'url' helper loaded by autoloading