Any one has done Advance RAG using llama-index on pdf using amazon bedrock model? I am running through errors while inferencing? If some one can share relevant doc or code.

I am getting this error when i am trying to use llama-2-13B-chat or mistral model from amazon bedrock..May I know , What should I do and how it will be resolved?

ImportError: cannot import name 'ArgPackComponent' from 'llama_index.core.query_pipeline.components' (/home2/asgtestdrive2023/Projects/CP/AI-Team/IDA_Document_Q_and_A/Dev/doc_qa_env/lib/python3.10/site-packages/llama_index/core/query_pipeline/components/init.py)

May I Know Why I am getting this erroe , whenever I am trying to get the node, the same error I am getting whenever response is getting run.
Below is code where it is starting.

ImportError Traceback (most recent call last)
Cell In[64], line 47
45 node_parser = UnstructuredElementNodeParser(llm=llm)
46 print('*%%'10)
---> 47 raw_nodes_ITC = node_parser.get_nodes_from_documents(ITC_2023)
49 base_nodes_ITC, node_mappings_ITC = node_parser.get_base_nodes_and_mappings(raw_nodes_ITC)