diff --git a/templates/js/script.php b/templates/js/script.php
index 3770873..27e1273 100644
--- a/templates/js/script.php
+++ b/templates/js/script.php
@@ -73,6 +73,10 @@ if ($_['always-displayed']) {
     const headerMenuOpener = document.querySelector('#header .side-menu-opener')
     const sideMenuOpener = document.querySelectorAll('#side-menu .side-menu-opener')
 
+    if (!headerMenuOpener) {
+      return
+    }
+
     sideMenuFocus = () => {
       let a = document.querySelector('.side-menu-app.active a', sideMenu)
 
@@ -174,9 +178,11 @@ if ($_['always-displayed']) {
     PageLoader()
   <?php endif; ?>
 
-  <?php if ($_['opener-position'] === 'before'): ?>
-    nextcloud.parentNode.insertBefore(sideMenuOpener, nextcloud)
-  <?php else: ?>
-    nextcloud.parentNode.insertBefore(sideMenuOpener, nextcloud.nextSibling)
-  <?php endif; ?>
+  if (nextcloud) {
+    <?php if ($_['opener-position'] === 'before'): ?>
+      nextcloud.parentNode.insertBefore(sideMenuOpener, nextcloud)
+    <?php else: ?>
+      nextcloud.parentNode.insertBefore(sideMenuOpener, nextcloud.nextSibling)
+    <?php endif; ?>
+  }
 })();