`agent_memory` list index out of range

python -m mindsearch.app --lang en --model_format gpt4 --search_engine DuckDuckGoSearch --asy 

streamlit run frontend/mindsearch_streamlit.py

Traceback (most recent call last):
  File "/Users/cxrh/Documents/GitHub/MindSearch/mindsearch/app.py", line 142, in generate
    async for message in agent(inputs, session_id=session_id):
  File "/Users/cxrh/Documents/GitHub/MindSearch/mindsearch/agent/streaming.py", line 50, in __call__
    async for response_message in self.forward(*message, session_id=session_id, **kwargs):
  File "/Users/cxrh/Documents/GitHub/MindSearch/mindsearch/agent/mindsearch_agent.py", line 189, in forward
    reference, references_url = _generate_references_from_graph(gen.ret[1])
  File "/Users/cxrh/Documents/GitHub/MindSearch/mindsearch/agent/mindsearch_agent.py", line 41, in _generate_references_from_graph
    assert data_item["memory"]["agent.memory"][2]["sender"].endswith("ActionExecutor")
IndexError: list index out of range