[2.x] Call page in Admin.... Permission Denied!

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public function index() {

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protected function index() {

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<?php
class ControllerModuleSendclousParcelList extends Controller {
    private $error = array(); // This is used to set the errors, if any.
 
    public function index() {
        // Loading the language file
        $this->load->language('sendcloud/parcel_list'); 
     
        // Set the title of the page to the heading title in the Language file i.e., Hello World
        $this->document->setTitle($this->language->get('heading_title'));
     
        // Load the Setting Model  (All of the OpenCart Module & General Settings are saved using this Model )
        $this->load->model('setting/setting');
     
        // Assign the language data for parsing it to view
        $data['heading_title'] = $this->language->get('heading_title');
        $data['text_edit']    = $this->language->get('text_edit');
        $data['text_module'] = $this->language->get('text_module');
        $data['text_success'] = $this->language->get('text_success');
        $data['text_content_top'] = $this->language->get('text_content_top');
        $data['text_content_bottom'] = $this->language->get('text_content_bottom');      
        $data['text_column_left'] = $this->language->get('text_column_left');
        $data['text_column_right'] = $this->language->get('text_column_right');
        $data['entry_code'] = $this->language->get('entry_code');
        $data['entry_layout'] = $this->language->get('entry_layout');
        $data['entry_position'] = $this->language->get('entry_position');
        $data['entry_status'] = $this->language->get('entry_status');
        $data['entry_sort_order'] = $this->language->get('entry_sort_order');

         
        // This Block returns the warning if any
        if (isset($this->error['warning'])) {
            $data['error_warning'] = $this->error['warning'];
        } else {
            $data['error_warning'] = '';
        }
     
        // This Block returns the error code if any
        if (isset($this->error['code'])) {
            $data['error_code'] = $this->error['code'];
        } else {
            $data['error_code'] = '';
        }     
     
        // Making of Breadcrumbs to be displayed on site
        $data['breadcrumbs'] = array();
        $data['breadcrumbs'][] = array(
            'text'      => $this->language->get('text_home'),
            'href'      => $this->url->link('common/home', 'token=' . $this->session->data['token'], 'SSL'),
            'separator' => false
        );
        $data['breadcrumbs'][] = array(
            'text'      => $this->language->get('text_module'),
            'href'      => $this->url->link('extension/module', 'token=' . $this->session->data['token'], 'SSL'),
            'separator' => ' :: '
        );
        $data['breadcrumbs'][] = array(
            'text'      => $this->language->get('heading_title'),
            'href'      => $this->url->link('sendcloud/parcel_list', 'token=' . $this->session->data['token'], 'SSL'),
            'separator' => ' :: '
        );
          
        $data['action'] = $this->url->link('sendcloud/parcel_list', 'token=' . $this->session->data['token'], 'SSL'); // URL to be directed when the save button is pressed
     
        $data['cancel'] = $this->url->link('sendcloud/parcel_list', 'token=' . $this->session->data['token'], 'SSL'); // URL to be redirected when cancel button is pressed

        $data['header'] = $this->load->controller('common/header');
        $data['column_left'] = $this->load->controller('common/column_left');
        $data['footer'] = $this->load->controller('common/footer');

        $this->response->setOutput($this->load->view('sendcloud/parcel_list.tpl', $data));

    }

}

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<?php echo $header; ?><?php echo $column_left; ?>
<div id="content">
<div class="page-header">
<div class="container-fluid">
<h1><?php echo $heading_title; ?></h1>
<ul class="breadcrumb">
<?php foreach ($breadcrumbs as $breadcrumb) { ?>
<li><a href="<?php echo $breadcrumb['href']; ?>"><?php echo $breadcrumb['text']; ?></a></li>
<?php } ?>
</ul>
</div>
</div>
<div class="container-fluid">
<?php if ($error_warning) { ?>
<div class="alert alert-danger"><i class="fa fa-exclamation-circle"></i> <?php echo $error_warning; ?>
<button type="button" class="close" data-dismiss="alert">&times;</button>
</div>
<?php } ?>
<?php if ($success) { ?>
<div class="alert alert-success"><i class="fa fa-check-circle"></i> <?php echo $success; ?>
<button type="button" class="close" data-dismiss="alert">&times;</button>
</div>
<?php } ?>
<div class="panel panel-default">
<div class="panel-heading">
<h3 class="panel-title"><i class="fa fa-list"></i> <?php echo $text_list; ?></h3>
</div>
<div class="panel-body">
<h3>some code here</h3>
<div class="row">
<div class="col-sm-6 text-left"><?php echo $pagination; ?></div>
<div class="col-sm-6 text-right"><?php echo $results; ?></div>
</div>
</div>
</div>
</div>
</div>
<?php echo $footer; ?>