diff --git a/examples/server/themes/mount-ai/index.html b/examples/server/themes/mount-ai/index.html
index 385046285..0e4fe44ee 100644
--- a/examples/server/themes/mount-ai/index.html
+++ b/examples/server/themes/mount-ai/index.html
@@ -277,7 +277,7 @@
                   data,
               }
             )
-        )
+        ).join(''),
       });
       if (selected_image) {
         prompt = `A chat between a curious human and an artificial intelligence assistant. The assistant gives helpful, detailed, and polite answers to the human's questions.\nUSER:[img-10]${msg}\nASSISTANT:`;