diff --git a/templates/js/script.php b/templates/js/script.php
index f62b7da..ace79ac 100644
--- a/templates/js/script.php
+++ b/templates/js/script.php
@@ -96,6 +96,10 @@ if ($_['always-displayed']) {
         const headerMenuOpener = querySelector('#header .side-menu-opener')
         const sideMenuOpener = querySelectorAll('#side-menu .side-menu-opener')
 
+        if (!headerMenuOpener) {
+            return
+        }
+
         sideMenuFocus = () => {
             let a = querySelector('.side-menu-app.active a', sideMenu)
 
@@ -197,11 +201,13 @@ if ($_['always-displayed']) {
         <?php require_once __DIR__.'/_loaderEnabled.js'; ?>
     <?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; ?>
+    }
 
     <?php if (!empty($_['top-menu-apps']) || !empty($_['top-side-menu-apps'])): ?>
         const topMenuApps = <?php echo json_encode($_['top-menu-apps']), "\n"; ?>