diff --git a/Admin/Installer.php b/Admin/Installer.php
index e893b46..3559343 100644
--- a/Admin/Installer.php
+++ b/Admin/Installer.php
@@ -52,6 +52,7 @@ class Installer extends InstallerAbstract
                             `nav_from` varchar(255) DEFAULT NULL,
                             `nav_order` smallint(3) DEFAULT NULL,
                             `nav_parent` int(11) DEFAULT NULL,
+                            `nav_permission_permission` int(11) DEFAULT NULL,
                             `nav_permission_type` int(11) DEFAULT NULL,
                             `nav_permission_element` int(11) DEFAULT NULL,
                             PRIMARY KEY (`nav_id`)
@@ -97,8 +98,8 @@ class Installer extends InstallerAbstract
     private static function installLink($dbPool, $data) : void
     {
         $sth = $dbPool->get()->con->prepare(
-            'INSERT INTO `' . $dbPool->get()->prefix . 'nav` (`nav_id`, `nav_pid`, `nav_name`, `nav_type`, `nav_subtype`, `nav_icon`, `nav_uri`, `nav_target`, `nav_from`, `nav_order`, `nav_parent`, `nav_permission_type`, `nav_permission_element`) VALUES
-                        (:id, :pid, :name, :type, :subtype, :icon, :uri, :target, :from, :order, :parent, :perm_type, :perm_element);'
+            'INSERT INTO `' . $dbPool->get()->prefix . 'nav` (`nav_id`, `nav_pid`, `nav_name`, `nav_type`, `nav_subtype`, `nav_icon`, `nav_uri`, `nav_target`, `nav_from`, `nav_order`, `nav_parent`, `nav_permission_permission`, `nav_permission_type`, `nav_permission_element`) VALUES
+                        (:id, :pid, :name, :type, :subtype, :icon, :uri, :target, :from, :order, :parent, :perm_perm, :perm_type, :perm_element);'
         );
 
         $sth->bindValue(':id', $data['id'] ?? 0, \PDO::PARAM_INT);
@@ -112,6 +113,7 @@ class Installer extends InstallerAbstract
         $sth->bindValue(':from', $data['from'] ?? 0, \PDO::PARAM_STR);
         $sth->bindValue(':order', $data['order'] ?? 1, \PDO::PARAM_INT);
         $sth->bindValue(':parent', $data['parent'], \PDO::PARAM_INT);
+        $sth->bindValue(':perm_perm', $data['permission']['permission'] ?? null, \PDO::PARAM_INT);
         $sth->bindValue(':perm_type', $data['permission']['type'] ?? null, \PDO::PARAM_INT);
         $sth->bindValue(':perm_element', $data['permission']['element'] ?? null, \PDO::PARAM_INT);
 
@@ -121,7 +123,7 @@ class Installer extends InstallerAbstract
 
         foreach ($data['children'] as $link) {
             $parent = ($link['parent'] == null ? $lastInsertID : $link['parent']);
-            self::installLink($dbPool, $link, $parent);
+            self::installLink($dbPool, $link);
         }
     }
 }
diff --git a/Models/Navigation.php b/Models/Navigation.php
index 31f694d..520308c 100644
--- a/Models/Navigation.php
+++ b/Models/Navigation.php
@@ -105,7 +105,7 @@ class Navigation
 
             foreach ($tempNav as $id => $link) {
                 $isReadable = $account->hasPermission(
-                    PermissionType::READ,
+                    (int) $link[0]['nav_permission_permission'],
                     $unit,
                     $app,
                     (string) $link[0]['nav_from'],
@@ -170,7 +170,7 @@ class Navigation
     public static function getInstance(RequestAbstract $hashes = null, Account $account, DatabasePool $dbPool, int $unit, string $appName)
     {
         if (!isset(self::$instance)) {
-            if (!isset($hashes) || !isset($dbPool)) {
+            if (!isset($hashes)) {
                 throw new \Exception('Invalid parameters');
             }
 
diff --git a/Theme/Backend/side.tpl.php b/Theme/Backend/side.tpl.php
index 997c9d5..9a554e0 100644
--- a/Theme/Backend/side.tpl.php
+++ b/Theme/Backend/side.tpl.php
@@ -24,12 +24,13 @@ if (isset($this->nav[\Modules\Navigation\Models\NavigationType::SIDE])) : ?>
                     <?php endif; ?>
                     <?= $this->getHtml($parent['nav_name']) ?><label for="nav-<?= $this->printHtml($parent['nav_name']); ?>"><i class="fa fa-chevron-down min"></i>
                     <i class="fa fa-chevron-up max"></i></label>
-                    <?php foreach ($this->nav[\Modules\Navigation\Models\NavigationType::SIDE][\Modules\Navigation\Models\LinkType::LINK] as $key2 => $link) :
+                    <?php if (isset($this->nav[\Modules\Navigation\Models\NavigationType::SIDE][\Modules\Navigation\Models\LinkType::LINK])) :
+                        foreach ($this->nav[\Modules\Navigation\Models\NavigationType::SIDE][\Modules\Navigation\Models\LinkType::LINK] as $key2 => $link) :
                     if ($link['nav_parent'] === $key) : ?>
                 <li>
                     <a href="<?= \phpOMS\Uri\UriFactory::build($link['nav_uri']); ?>"><?= $this->getHtml($link['nav_name']) ?></a>
                     <?php endif;
-                    endforeach; ?>
+                    endforeach; endif; ?>
             </ul>
             <?php endforeach; ?>
     </ul>