fix: handle pandas Series in get_message boolean evaluation

src/backend/base/langflow/schema/schema.py

@@ -2,6 +2,7 @@
 from enum import Enum
 from typing import Literal
 
+from pandas import Series
 from pydantic import BaseModel
 from typing_extensions import TypedDict
 
@@ -78,6 +79,9 @@ def get_message(payload):
     if message is None and isinstance(payload, dict | str | Data):
         message = payload.data if isinstance(payload, Data) else payload
 
+    if isinstance(message, Series):
+        return message if not message.empty else payload
+
     return message or payload