runtime error

in ChatMemoryBuffer default_factory=cast(Callable[[], Any], GlobalsHelper().tokenizer), File "/home/user/.local/lib/python3.9/site-packages/llama_index/utils.py", line 50, in tokenizer enc = tiktoken.get_encoding("gpt2") File "/home/user/.local/lib/python3.9/site-packages/tiktoken/registry.py", line 63, in get_encoding enc = Encoding(**constructor()) File "/home/user/.local/lib/python3.9/site-packages/tiktoken_ext/openai_public.py", line 11, in gpt2 mergeable_ranks = data_gym_to_mergeable_bpe_ranks( File "/home/user/.local/lib/python3.9/site-packages/tiktoken/load.py", line 75, in data_gym_to_mergeable_bpe_ranks vocab_bpe_contents = read_file_cached(vocab_bpe_file).decode() File "/home/user/.local/lib/python3.9/site-packages/tiktoken/load.py", line 48, in read_file_cached contents = read_file(blobpath) File "/home/user/.local/lib/python3.9/site-packages/tiktoken/load.py", line 24, in read_file resp = requests.get(blobpath) File "/home/user/.local/lib/python3.9/site-packages/requests/api.py", line 73, in get return request("get", url, params=params, **kwargs) File "/home/user/.local/lib/python3.9/site-packages/requests/api.py", line 59, in request return session.request(method=method, url=url, **kwargs) File "/home/user/.local/lib/python3.9/site-packages/requests/sessions.py", line 589, in request resp = self.send(prep, **send_kwargs) File "/home/user/.local/lib/python3.9/site-packages/requests/sessions.py", line 703, in send r = adapter.send(request, **kwargs) File "/home/user/.local/lib/python3.9/site-packages/requests/adapters.py", line 519, in send raise ConnectionError(e, request=request) requests.exceptions.ConnectionError: HTTPSConnectionPool(host='openaipublic.blob.core.windows.net', port=443): Max retries exceeded with url: /gpt-2/encodings/main/vocab.bpe (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f469529c130>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution'))

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