TypeError: add_tokens() got an unexpected keyword argument 'offset'

[Pxtri2156]

Hi everyone,
I try to run this repo, but I met error below:

Traceback (most recent call last):  
  File "train_eval.py", line 481, in <module>
    main()
  File "train_eval.py", line 437, in main
    num_added = tokenizer.add_tokens(add_tokens, offset=offset)
TypeError: add_tokens() got an unexpected keyword argument 'offset' 

My environment:

• Python: 3.7.0
• Transformers: 2.2.0
• Tensorflow: 2.0

I checked all of version of the transformer, but I haven't found version that has offset argument in the add_tokens method