diff --git a/server/notes/schema.py b/server/notes/schema.py
index 17afc440..f57d215f 100644
--- a/server/notes/schema.py
+++ b/server/notes/schema.py
@@ -41,7 +41,7 @@ def find_content(content_list, bookmark):
     if content is None:
         return ''
     if content['type'] in ['text_block', 'subtitle', 'solution', 'basic_knowledge']:
-        return content['value']['text']
+        return content['value'].get('text', '')
     return content_dict.get(content['type'], '')
 
 class NoteNode(DjangoObjectType):