Summarization pipeline - Couldn't reach server at 'https://s3.amazonaws.com/models.huggingface.co/bert/facebook/bart-large-cnn/modelcard.json'
# 🐛 Bug

## Information
Loading the summarization pipeline will result in below assertion: 

> Couldn't reach server at 'https://s3.amazonaws.com/models.huggingface.co/bert/facebook/bart-large-cnn/modelcard.json' to download model card file.
> Creating an empty model card.


The problem arises when using:
* [V] the official example scripts: (give details below)
* [ ] my own modified scripts: (give details below)

The tasks I am working on is:
* [ ] an official GLUE/SQUaD task: (give the name)
* [ ] my own task or dataset: (give details below)

## To reproduce

Steps to reproduce the behavior:
`!pip install -q transformers --upgrade
from transformers import pipeline
summarizer = pipeline(task="summarization")`

1. Execute above code


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## Expected behavior

<!-- A clear and concise description of what you would expect to happen. -->

## Environment info
<!-- You can run the command `python transformers-cli env` and copy-and-paste its output below.
     Don't forget to fill out the missing fields in that output! -->
     
- `transformers` version:
- Platform:
- Python version:
- PyTorch version (GPU?):
- Tensorflow version (GPU?):
- Using GPU in script?:
- Using distributed or parallel set-up in script?:

@julien-c This is issue has been closed, but I continue to get the same exact error. Can you reopen it? Or do I have to open a new issue?<|||||>Did you update from master. 

Can you paste the output of `transformers-cli env`<|||||>I just upgraded to the latest version:
```
- `transformers` version: 2.8.0
- Platform: Linux-5.3.0-46-generic-x86_64-with-Ubuntu-19.10-eoan
- Python version: 3.7.5
- PyTorch version (GPU?): 1.1.0 (False)
- Tensorflow version (GPU?): not installed (NA)
- Using GPU in script?: No
- Using distributed or parallel set-up in script?: No
```<|||||>The fix is not in a released version yet so you need to install from source.