diff --git a/lib.php b/lib.php
index b294f1a..c18e020 100644
--- a/lib.php
+++ b/lib.php
@@ -26,6 +26,7 @@ $smarty = new Smarty();
 $smarty->template_dir = 'tpl';
 $smarty->compile_dir = 'tpl_c';
 $smarty->registerPlugin('function', 'treelist', 'print_tree');
-$smarty->assign("suser_tooltips", $_SESSION['suser_tooltips']);
+
+$smarty->assign("suser_tooltips", $_SESSION['suser_tooltips'] ?? 'off');
 
 ?>
diff --git a/lib/functions.php b/lib/functions.php
index 96cb7e3..dbb09b8 100644
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -141,7 +141,8 @@ function print_tree_rec($tree, $level) {
     return $output;
 }
 
-function print_tree($params, &$smarty) {
+//function print_tree($params, &$smarty) {
+function print_tree($params, Smarty_Internal_Template $template) {
     if (empty($params['level'])) {
         $level = 0;
     } else {
diff --git a/node.php b/node.php
index c03a421..25fc72f 100644
--- a/node.php
+++ b/node.php
@@ -15,7 +15,8 @@ if(isset($_GET['subnet_id'])) {
     $subnet_view = "WHERE node.subnet_id=" . $subnet_id;
     $smarty->assign("subnet_id", $subnet_id);
 } else {
-    $smarty->assign("subnet_id", "");
+    $smarty->assign("subnet_id", '');
+    $subnet_view = '';
 }
 
 $query = "SELECT
diff --git a/tpl/node.tpl b/tpl/node.tpl
index f830586..606f7e7 100644
--- a/tpl/node.tpl
+++ b/tpl/node.tpl
@@ -2,7 +2,7 @@
 <tr>
     <td class="header">
         <img class="icon" src="images/network-ethernet.png" alt="" />
-        {$lang_nodes} ({$node|@count})
+        {$lang_nodes} ({$nodes|@count})
     </td>
     <td align="right">
         <a href="nodeadd.php?subnet_id={$subnet_id}"><img src="image.php?icon=add" alt="{$lang_node_add}"></a>