Hosted inference api keeps returning 400 error
I'm not sure if it's okay to make issue with this topic, but I couldn't find a place to share my problem so I'm making an issue.

### Problem description
When I try to inference a public model (facebook/blenderbot-1B-distill), it keeps returning 400 error with message below, whether I tried it on model hub or through HTTP request.
`'We could not properly load your model with any of the classes {model_classes}, are you sure this model can be loaded with the specified task ?'`

I used this model normally a few days ago, but now it's not working. May I ask for a help? Any advice would be appreciated..

![image](https://user-images.githubusercontent.com/5675167/121697156-bd88c980-cb07-11eb-94f6-5b03222d3ae2.png)

I found it resolved by fixing model config. Now it's working