 CLIPProcessor.from_pretrained is None
### System Info

transformers version: 4.20.1

### Who can help?

@patil-suraj

### Information

- [X] The official example scripts
- [ ] My own modified scripts

### Tasks

- [X] An officially supported task in the `examples` folder (such as GLUE/SQuAD, ...)
- [ ] My own task or dataset (give details below)

### Reproduction

from transformers import CLIPProcessor, CLIPModel

processor = CLIPProcessor.from_pretrained("openai/clip-vit-base-patch32")

### Expected behavior

returned processor without `TypeError: 'NoneType' object is not callable`.
Could you try:
- updating Transforemrs to the latest version
- make sure you have all optional dependencies necessary for CLIP (PILlow mainly)<|||||>This issue has been automatically marked as stale because it has not had recent activity. If you think this still needs to be addressed please comment on this thread.

Please note that issues that do not follow the [contributing guidelines](https://github.com/huggingface/transformers/blob/main/CONTRIBUTING.md) are likely to be ignored.