RAG Agent example doesn't work

[zzhi-github]

This is the example codes:
from praisonaiagents import Agent

config = {
"vector_store": {
"provider": "chroma",
"config": {
"collection_name": "praison",
"path": ".praison",
}
}
}

agent = Agent(
name="Knowledge Agent",
instructions="You answer questions based on the provided knowledge.",
knowledge=["large.pdf"],
knowledge_config=config,
user_id="user1"
)

agent.start("What is KAG in one line?")

It doesn't work as expectation. There are many errors when running it.
Error 1:
ERROR [21:17:07] knowledge.py:214 ERROR Error storing content: 404 page not found knowledge.py:214
ERROR [21:17:07] knowledge.py:214 ERROR Error storing content: 404 page not found knowledge.py:214

Error 2:
PraisonAI/.venv/lib/python3.12/site-packages/praisonaiagents/knowledge/knowledge.py", line 243, in search
return self.memory.search(query, user_id=user_id, agent_id=agent_id, run_id=run_id, rerank=rerank, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: Memory.search() got an unexpected keyword argument 'rerank'
INFO [21:17:07] _common.py:105 INFO Backing off send_request(...) for 0.3s (requests.exceptions.ConnectionError: _common.py:105
HTTPSConnectionPool(host='us.i.posthog.com', port=443): Max retries exceeded with url: /batch/ (Caused by
NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xffff3c9db1d0>: Failed to resolve 'us.i.posthog.com' ([Errno -2]
Name or service not known)")))
[21:17:08] INFO [21:17:08] _common.py:105 INFO Backing off send_request(...) for 1.7s (requests.exceptions.ConnectionError: _common.py:105
HTTPSConnectionPool(host='us.i.posthog.com', port=443): Max retries exceeded with url: /batch/ (Caused by
NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xffff3c9dbd70>: Failed to resolve 'us.i.posthog.com' ([Errno -2]
Name or service not known)")))
[21:17:09] INFO [21:17:09] _common.py:105 INFO Backing off send_request(...) for 0.3s (requests.exceptions.ConnectionError: _common.py:105
HTTPSConnectionPool(host='us.i.posthog.com', port=443): Max retries exceeded with url: /batch/ (Caused by
NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xffff3c9c07a0>: Failed to resolve 'us.i.posthog.com' ([Errno -2]
Name or service not known)")))
[21:17:10] ERROR [21:17:10] _common.py:120 ERROR Giving up send_request(...) after 4 tries (requests.exceptions.ConnectionError: _common.py:120
HTTPSConnectionPool(host='us.i.posthog.com', port=443): Max retries exceeded with url: /batch/ (Caused by
NameResolutionError("<urllib3.connection.HTTPSConnection object at 0xffff3c9c1010>: Failed to resolve 'us.i.posthog.com' ([Errno -2]
Name or service not known)")))

---

ls -l .praison/
total 164
drwxr-xr-x 1 98 Jun 28 17:43 868d83d6-b777-40ef-aad9-b20b8a782976
-rw-r--r-- 1 167936 Jun 28 21:17 chroma.sqlite3