From 756b7460f5f6db7416dab3c51f8e8920523e933d Mon Sep 17 00:00:00 2001
From: Philipp Rudiger <prudiger@anaconda.com>
Date: Wed, 21 Aug 2024 14:11:26 +0200
Subject: [PATCH] Fix serialization on empty Column/Tabs

---
 lumen/ai/assistant.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lumen/ai/assistant.py b/lumen/ai/assistant.py
index 8ede84b3..15e276db 100644
--- a/lumen/ai/assistant.py
+++ b/lumen/ai/assistant.py
@@ -424,6 +424,8 @@ def _serialize(self, obj):
                     continue
                 if hasattr(o, "visible") and o.visible:
                     break
+            else:
+                return ""
             return self._serialize(o)
 
         if isinstance(obj, HTML) and 'catalog' in obj.tags: