diff --git a/main/admin/index.php b/main/admin/index.php
index 3a5ac68b7a..10edcf5006 100644
--- a/main/admin/index.php
+++ b/main/admin/index.php
@@ -502,12 +502,12 @@ if (api_is_platform_admin()) {
             $items = array();
 
             foreach ($menuAdministratorItems as $pluginName) {
-                $pluginInfo = $plugin_obj->getPluginInfo($pluginName);
+                $pluginInfo = $plugin_obj->getPluginInfo($pluginName, true);
                 /** @var \Plugin $plugin */
                 $plugin = $pluginInfo['obj'];
                 $pluginUrl = $plugin->getAdminUrl();
 
-                if (!$pluginUrl) {
+                if (empty($pluginUrl)) {
                     continue;
                 }
 
@@ -518,7 +518,7 @@ if (api_is_platform_admin()) {
             }
 
             $blocks['plugins']['items'] = $items;
-            $blocks['plugins']['extra'] = null;
+            $blocks['plugins']['extra'] = '';
         }
     }
 
diff --git a/main/inc/lib/api.lib.php b/main/inc/lib/api.lib.php
index daf76b55be..02c903a3ec 100644
--- a/main/inc/lib/api.lib.php
+++ b/main/inc/lib/api.lib.php
@@ -3371,7 +3371,7 @@ function api_not_allowed(
         $show_headers = 1;
     }
 
-    $tpl = new Template(null, $show_headers, $show_headers);
+    $tpl = new Template(null, $show_headers, $show_headers, false, true, false);
     $tpl->assign('hide_login_link', 1);
     $tpl->assign('content', $msg);
 
diff --git a/main/inc/lib/plugin.class.php b/main/inc/lib/plugin.class.php
index 139469a45d..ba3a79bd12 100755
--- a/main/inc/lib/plugin.class.php
+++ b/main/inc/lib/plugin.class.php
@@ -897,12 +897,12 @@ class Plugin
 
     /**
      * Get the admin URL for the plugin if Plugin::isAdminPlugin is true
-     * @return null|string
+     * @return string
      */
     public function getAdminUrl()
     {
         if (!$this->isAdminPlugin) {
-            return null;
+            return '';
         }
 
         $name = $this->get_name();
@@ -917,6 +917,6 @@ class Plugin
             return "$webPath/start.php";
         }
 
-        return null;
+        return '';
     }
 }
diff --git a/main/inc/lib/plugin.lib.php b/main/inc/lib/plugin.lib.php
index 722a766fef..770eb8a66e 100755
--- a/main/inc/lib/plugin.lib.php
+++ b/main/inc/lib/plugin.lib.php
@@ -411,7 +411,6 @@ class AppPlugin
     public function getPluginInfo($plugin_name, $forced = false)
     {
         $pluginData = Session::read('plugin_data');
-
         if (isset($pluginData[$plugin_name]) && $forced == false) {
             return $pluginData[$plugin_name];
         } else {
diff --git a/plugin/redirection/RedirectionPlugin.php b/plugin/redirection/RedirectionPlugin.php
index 107175b7d7..791153db69 100644
--- a/plugin/redirection/RedirectionPlugin.php
+++ b/plugin/redirection/RedirectionPlugin.php
@@ -8,6 +8,8 @@
  */
 class RedirectionPlugin extends Plugin
 {
+    public $isAdminPlugin = true;
+
     /**
      * Class constructor
      */
@@ -15,11 +17,13 @@ class RedirectionPlugin extends Plugin
     {
         $version = '1.0';
         $author = 'Enrique Alcaraz, Julio Montoya';
-
         parent::__construct($version, $author, ['enabled' => 'boolean']);
+        $this->isAdminPlugin = true;
     }
 
-
+    /**
+     * @return RedirectionPlugin
+     */
     public static function create()
     {
         static $result = null;
diff --git a/plugin/redirection/admin.php b/plugin/redirection/admin.php
new file mode 100644
index 0000000000..28d22c9e24
--- /dev/null
+++ b/plugin/redirection/admin.php
@@ -0,0 +1,5 @@
+<?php
+/* For licensing terms, see /license.txt */
+
+header('Location: index.php');
+exit;
diff --git a/plugin/redirection/index.php b/plugin/redirection/index.php
index bd399c0ead..fad638a03d 100644
--- a/plugin/redirection/index.php
+++ b/plugin/redirection/index.php
@@ -29,45 +29,51 @@ if (isset($_REQUEST['id'])) {
     exit;
 }
 
-Display::display_header();
-
-?>
+$content = '
 <form action="./index.php" method="post">
     <div class="table-responsive well">
         <table class="table table-condensed">
             <thead>
             <td><input type="text" class="form-control" placeholder="User Id" name="user_id"/></td>
             <td><input type="text" class="form-control" placeholder="URL" name="url"/></td>
-            <td><input type='submit' value='Add' name="submit_button" class='btn btn-primary'/></td>
+            <td><input type=\'submit\' value=\'Add\' name="submit_button" class=\'btn btn-primary\'/></td>
             </thead>
         </table>
     </div>
 </form>
-
-
 <div class="table-responsive">
     <table class="table table-bordered table-condensed">
         <tr>
             <th>User</th>
             <th>URL</th>
             <th></th>
-        </tr>
-        <?php
-        foreach ($list as $item) {
-            $userInfo = api_get_user_info($item['user_id']);
-            $userName = get_lang('Unknown');
-            if (!empty($userInfo)) {
-                $userName = $userInfo['complete_name_with_username'].' - '.$item['user_id'];
-            }
-            echo '<tr>';
-            echo '<td>'.$userName.'</td>';
-            echo '<td>'.$item['url'].'</td>';
-            echo '<td><a class="btn btn-danger" href="index.php?id='.$item['id'].'">Delete</a></td>';
-            echo '</tr>';
-        }
-        ?>
-    </table>
-</div>
-<?php
+        </tr>        
+';
+
+foreach ($list as $item) {
+    $userInfo = api_get_user_info($item['user_id']);
+    $userName = get_lang('Unknown');
+    if (!empty($userInfo)) {
+        $userName = $userInfo['complete_name_with_username'].' - '.$item['user_id'];
+    }
+    $content.= '<tr>';
+    $content.= '<td>'.$userName.'</td>';
+    $content.= '<td>'.$item['url'].'</td>';
+    $content.= '<td><a class="btn btn-danger" href="index.php?id='.$item['id'].'">Delete</a></td>';
+    $content.= '</tr>';
+}
+
+$content.= '
+</table>
+</div>';
 
-Display::display_footer();
\ No newline at end of file
+$tpl = new Template(
+    '',
+    true,
+    true,
+    false,
+    false,
+    false
+);
+$tpl->assign('content', $content);
+$tpl->display_one_col_template();