Error on starting horovod

[MasoudKaviani]

When we run
horovodrun -np 1 python src/pretrain/run_pretrain.py --config src/configs/msrvtt_retrieval/msrvtt_retrieval_vip_base_32.json
We get the following error:

<stderr>:  File "src/pretrain/run_pretrain.py", line 22, in <module>                                                                                             
<stderr>:    from transformers import CLIPTokenizerFast                                                                                                          
<stderr>:ImportError: cannot import name 'CLIPTokenizerFast' from 'transformers' (/usr/local/lib/python3.7/dist-packages/transformers/__init__.py) ```