`gr.load` doesn't work for `gr.ChatInterface` Spaces

[hysts]

Describe the bug

When loading gr.ChatInterface Space with gr.load, an error occurs in the called Space.

For example, if you load this Space

import gradio as gr

def fn(message, history):
    return message

gr.ChatInterface(fn=fn).launch()

with gr.load like this

import gradio as gr

gr.load("hysts-debug/sample-chat", src="spaces").launch()

the Space can be loaded, but the Space raises the following error when you run it:

To create a public link, set `share=True` in `launch()`.
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/gradio/routes.py", line 992, in predict
    output = await route_utils.call_process_api(
  File "/usr/local/lib/python3.10/site-packages/gradio/route_utils.py", line 323, in call_process_api
    output = await app.get_blocks().process_api(
  File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 2019, in process_api
    result = await self.call_function(
  File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 1566, in call_function
    prediction = await anyio.to_thread.run_sync(  # type: ignore
  File "/usr/local/lib/python3.10/site-packages/anyio/to_thread.py", line 56, in run_sync
    return await get_async_backend().run_sync_in_worker_thread(
  File "/usr/local/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 2441, in run_sync_in_worker_thread
    return await future
  File "/usr/local/lib/python3.10/site-packages/anyio/_backends/_asyncio.py", line 943, in run
    result = context.run(func, *args)
  File "/usr/local/lib/python3.10/site-packages/gradio/utils.py", line 865, in wrapper
    response = f(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/gradio_client/client.py", line 1133, in _inner
    predictions = _predict(*data)
  File "/usr/local/lib/python3.10/site-packages/gradio_client/client.py", line 1245, in _predict
    raise AppError(
gradio_client.exceptions.AppError: The upstream Gradio app has raised an exception but has not enabled verbose error reporting. To enable, set show_error=True in launch().

and you get the following error in the log of the called Space:

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/gradio/queueing.py", line 624, in process_events
    response = await route_utils.call_process_api(
  File "/usr/local/lib/python3.10/site-packages/gradio/route_utils.py", line 323, in call_process_api
    output = await app.get_blocks().process_api(
  File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 2019, in process_api
    result = await self.call_function(
  File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 1564, in call_function
    prediction = await fn(*processed_input)
  File "/usr/local/lib/python3.10/site-packages/gradio/utils.py", line 832, in async_wrapper
    response = await f(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/gradio/chat_interface.py", line 616, in _display_input
    history.append([message, None])  # type: ignore
AttributeError: 'NoneType' object has no attribute 'append'
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/gradio/queueing.py", line 624, in process_events
    response = await route_utils.call_process_api(
  File "/usr/local/lib/python3.10/site-packages/gradio/route_utils.py", line 323, in call_process_api
    output = await app.get_blocks().process_api(
  File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 2019, in process_api
    result = await self.call_function(
  File "/usr/local/lib/python3.10/site-packages/gradio/blocks.py", line 1564, in call_function
    prediction = await fn(*processed_input)
  File "/usr/local/lib/python3.10/site-packages/gradio/utils.py", line 832, in async_wrapper
    response = await f(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/gradio/chat_interface.py", line 664, in _submit_fn
    message_serialized, history = self._process_msg_and_trim_history(
  File "/usr/local/lib/python3.10/site-packages/gradio/chat_interface.py", line 641, in _process_msg_and_trim_history
    history = history_with_input[:-1]
TypeError: 'NoneType' object is not subscriptable

Have you searched existing issues? 🔎

• [X] I have searched and found no existing issues

Reproduction

https://huggingface.co/spaces/hysts-debug/load-chatinterface https://huggingface.co/spaces/hysts-debug/sample-chat

Screenshot

No response

Logs

No response

System Info

gradio==5.7.1

Severity

I can work around it

[hysts]

cc @AK391