ValueError: Tokenizer class XgenTokenizer does not exist or is not currently imported.

[EuclidM17]

I need help.
When using model = "Salesforce/xgen-7b-4k-base" or model = "Salesforce/xgen-7b-8k-base"

/usr/local/lib/python3.10/dist-packages/transformers/models/auto/tokenization_auto.py in from_pretrained(cls, pretrained_model_name_or_path, *inputs, **kwargs)
687 tokenizer_class = tokenizer_class_from_name(tokenizer_class_candidate)
688 if tokenizer_class is None:
--> 689 raise ValueError(
690 f"Tokenizer class {tokenizer_class_candidate} does not exist or is not currently imported."
691 )

ValueError: Tokenizer class XgenTokenizer does not exist or is not currently imported.

I have this issue locally or in googla colab.

I import these :
!pip install git+https://www.github.com/huggingface/transformers
!pip install git+https://github.com/huggingface/accelerate
!pip install bitsandbytes
!pip install tiktoken

[gardner]

The XgenTokenizer is defined in a python file that is included in the model repo: https://huggingface.co/Salesforce/xgen-7b-4k-base/blob/main/tokenization_xgen.py