diff --git a/apps/client/src/services/render.tsx b/apps/client/src/services/render.tsx
index 682efa8871..31450b3a82 100644
--- a/apps/client/src/services/render.tsx
+++ b/apps/client/src/services/render.tsx
@@ -18,6 +18,10 @@ async function render(note: FNote, $el: JQuery<HTMLElement>, onError?: ErrorHand
         for (const renderNoteId of renderNoteIds) {
             const bundle = await server.postWithSilentInternalServerError<Bundle>(`script/bundle/${renderNoteId}`);
 
+            if (!bundle) {
+                throw new Error(`Script note '${renderNoteId}' could not be loaded. It may be protected and require an active protected session.`);
+            }
+
             const $scriptContainer = $("<div>");
             $el.append($scriptContainer);