AttributeError: 'Docs' object has no attribute '_build_faiss_index'

[LolerPanda]

When I run the huggingface demo locally, I encounter the following problem.

Traceback (most recent call last): File "/Users/mac/miniconda3/lib/python3.11/site-packages/gradio/queueing.py", line 407, in call_prediction output = await route_utils.call_process_api( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/gradio/route_utils.py", line 226, in call_process_api output = await app.get_blocks().process_api( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/gradio/blocks.py", line 1550, in process_api result = await self.call_function( ^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/gradio/blocks.py", line 1199, in call_function prediction = await utils.async_iteration(iterator) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/gradio/utils.py", line 519, in async_iteration return await iterator.__anext__() ^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/gradio/utils.py", line 512, in __anext__ return await anyio.to_thread.run_sync( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/anyio/to_thread.py", line 33, in run_sync return await get_asynclib().run_sync_in_worker_thread( ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 877, in run_sync_in_worker_thread return await future ^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 807, in run result = context.run(func, *args) ^^^^^^^^^^^^^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/gradio/utils.py", line 495, in run_sync_iterator_async return next(iterator) ^^^^^^^^^^^^^^ File "/Users/mac/miniconda3/lib/python3.11/site-packages/gradio/utils.py", line 649, in gen_wrapper yield from f(*args, **kwargs) File "/Users/mac/paper-qa/app.py", line 66, in do_ask docs._build_faiss_index() ^^^^^^^^^^^^^^^^^^^^^^^ AttributeError: 'Docs' object has no attribute '_build_faiss_index'