[BUG]-Network error while importing flava_model_for_classification from torchmultimodal

Add Link

https://pytorch.org/tutorials/beginner/flava_finetuning_tutorial.html

Describe the bug

In the following code snippet:

from torchmultimodal.models.flava.model import flava_model_for_classification
model = flava_model_for_classification(num_classes=len(vocab))

I am getting the following error:

Failed to download https://download.pytorch.org/models/multimodal/flava/flava_for_pretraining_unified_text_encoder.pt

Here is the error trace:

SSLCertVerificationError                  Traceback (most recent call last)
File [/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/urllib/request.py:1348](https://file+.vscode-resource.vscode-cdn.net/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/urllib/request.py:1348), in AbstractHTTPHandler.do_open(self, http_class, req, **http_conn_args)
   1347 try:
-> 1348     h.request(req.get_method(), req.selector, req.data, headers,
   1349               encode_chunked=req.has_header('Transfer-encoding'))
   1350 except OSError as err: # timeout error

File [/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py:1286](https://file+.vscode-resource.vscode-cdn.net/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py:1286), in HTTPConnection.request(self, method, url, body, headers, encode_chunked)
   1285 """Send a complete request to the server."""
-> 1286 self._send_request(method, url, body, headers, encode_chunked)

File [/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py:1332](https://file+.vscode-resource.vscode-cdn.net/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py:1332), in HTTPConnection._send_request(self, method, url, body, headers, encode_chunked)
   1331     body = _encode(body, 'body')
-> 1332 self.endheaders(body, encode_chunked=encode_chunked)

File [/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py:1281](https://file+.vscode-resource.vscode-cdn.net/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py:1281), in HTTPConnection.endheaders(self, message_body, encode_chunked)
   1280     raise CannotSendHeader()
-> 1281 self._send_output(message_body, encode_chunked=encode_chunked)

File [/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py:1041](https://file+.vscode-resource.vscode-cdn.net/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/http/client.py:1041), in HTTPConnection._send_output(self, message_body, encode_chunked)
   1040 del self._buffer[:]
-> 1041 self.send(msg)
   1043 if message_body is not None:
   1044 
...
-> 1351         raise URLError(err)
   1352     r = h.getresponse()
   1353 except:

URLError:

Describe your environment

Platform: macOS
Python version: 3.11.6
CUDA: no
PyTorch version: 2.0.1

cc @kartikayk @ankitade

Start by reproducing the code snippet from the linked FLAVA fine-tuning tutorial in the reported macOS and Python environment, then inspect the flava_model_for_classification entry point and the failing model-download URL. Done means the tutorial no longer leads to the reported SSL download failure, or clearly documents the required resolution if the cause is external.