diff --git a/src/backend/langflow/api/v1/chat.py b/src/backend/langflow/api/v1/chat.py
index 2423d1431..164dd2dd5 100644
--- a/src/backend/langflow/api/v1/chat.py
+++ b/src/backend/langflow/api/v1/chat.py
@@ -160,7 +160,13 @@ async def stream_build(flow_id: str):
                 input_keys_response = build_input_keys_response(
                     langchain_object, artifacts
                 )
-                yield str(StreamData(event="message", data=input_keys_response))
+            else:
+                input_keys_response = {
+                    "input_keys": {},
+                    "memory_keys": [],
+                    "handle_keys": [],
+                }
+            yield str(StreamData(event="message", data=input_keys_response))
 
             chat_manager.set_cache(flow_id, langchain_object)
             # We need to reset the chat history
diff --git a/src/backend/langflow/api/v1/validate.py b/src/backend/langflow/api/v1/validate.py
index aa3748785..2a5bdd673 100644
--- a/src/backend/langflow/api/v1/validate.py
+++ b/src/backend/langflow/api/v1/validate.py
@@ -73,12 +73,14 @@ def add_new_variables_to_template(input_variables, prompt_request):
                 advanced=False,
                 multiline=True,
                 input_types=["Document", "BaseOutputParser"],
+                value="",  # Set the value to empty string
             )
             if variable in prompt_request.frontend_node.template:
                 # Set the new field with the old value
                 template_field.value = prompt_request.frontend_node.template[variable][
                     "value"
                 ]
+
             prompt_request.frontend_node.template[variable] = template_field.to_dict()
 
             # Check if variable is not already in the list before appending
diff --git a/src/backend/langflow/graph/vertex/base.py b/src/backend/langflow/graph/vertex/base.py
index ab3abec46..67fd4e005 100644
--- a/src/backend/langflow/graph/vertex/base.py
+++ b/src/backend/langflow/graph/vertex/base.py
@@ -226,4 +226,4 @@ class Vertex:
         return id(self)
 
     def _built_object_repr(self):
-        return repr(self._built_object)
+        return "Built sucessfully" if self._built_object else "Not built yet"