diff --git a/src/components/ui/VnSubToolbar.vue b/src/components/ui/VnSubToolbar.vue
index c0d129613..8c86c056a 100644
--- a/src/components/ui/VnSubToolbar.vue
+++ b/src/components/ui/VnSubToolbar.vue
@@ -18,7 +18,7 @@ onMounted(() => {
     const observer = new MutationObserver(
         () =>
             (hasContent.value =
-                actions.value.childNodes.length + data.value.childNodes.length)
+                actions.value?.childNodes?.length + data.value?.childNodes?.length)
     );
     if (actions.value) observer.observe(actions.value, opts);
     if (data.value) observer.observe(data.value, opts);