Saying "hello" to cloned elon leads to KeyError: 'None'

[motin]

Environment:
Apple M1 Max
13.5 (22G74)

Steps to reproduce:

1. Follow the GentPool readme to install GentPool:

conda create --name gentenv python=3.10
conda activate gentenv
pip install gentopia
git clone git@github.com:Gentopia-AI/GentPool.git
cd GentPool
touch .env
echo "OPENAI_API_KEY=<my_openai_api_key>" >> .env

2. Then clone and assemble elon as per the README (omitting --print_agent due to Using --print_agent leads to RecursionError: maximum recursion depth exceeded while calling a Python object #17):

./clone_agent elon foo
python assemble.py foo

3. Write "hello" and press enter

Expected results:
No exception thrown. Maybe the agent realizes that there is no ask and resolves to responding in a polite and friendly manner, but no exception should be thrown that prevents the agent from doing so.

Actual results:
Exception thrown:

$ python assemble.py foo
╭───────────────────────────────────────────────────── Gentopia ──────────────────────────────────────────────────────╮
│ Welcome to Gentopia!                                                                                                │
╰─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╯
User: hello
foo:
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ foo ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ The user has greeted me. I should respond in a polite and friendly manner.                                          ┃
┃                                                                                                                     ┃
┃ Action: None                                                                                                        ┃
┃                                                                                                                     ┃
┃ Action Input: None                                                                                                  ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
Traceback (most recent call last):
  File "/Users/motin/Dev/Projects/generative-reality/reproduce-issue/GentPool/assemble.py", line 41, in <module>
    main()
  File "/Users/motin/Dev/Projects/generative-reality/reproduce-issue/GentPool/assemble.py", line 37, in main
    chat(agent, verbose=print_agent)
  File "/opt/homebrew/Caskroom/miniforge/base/envs/gentenv/lib/python3.10/site-packages/gentopia/__init__.py", line 26,
in chat
    response = agent.stream(text, output=output)
  File "/opt/homebrew/Caskroom/miniforge/base/envs/gentenv/lib/python3.10/site-packages/gentopia/agent/react/agent.py",
line 224, in stream
    result = self._format_function_map()[action](tool_input)
KeyError: 'None'
⠸ Calling function: None ...