module 'transformers' has no attribute 'TFRobertaDot_NLL_LN'

[LinxiCai]

HI,
I met a problem when I was running the run_train_warmup.sh,it appeared:

Traceback (most recent call last):
File "../drivers/run_warmup.py", line 758, in
main()
File "../drivers/run_warmup.py", line 733, in main
config, tokenizer, model, configObj = load_stuff(
File "../drivers/run_warmup.py", line 312, in load_stuff
model = configObj.model_class.from_pretrained(
File "/home/coseven/anaconda3/lib/python3.8/site-packages/transformers-2.3.0-py3.8.egg/transformers/modeling_utils.py", line 432, in from_pretrained
model = load_tf2_checkpoint_in_pytorch_model(model, resolved_archive_file, allow_missing_keys=True)
File "/home/coseven/anaconda3/lib/python3.8/site-packages/transformers-2.3.0-py3.8.egg/transformers/modeling_tf_pytorch_utils.py", line 205, in load_tf2_checkpoint_in_pytorch_model
tf_model_class = getattr(transformers, tf_model_class_name)
AttributeError: module 'transformers' has no attribute 'TFRobertaDot_NLL_LN'

but my transformers version is 2.3.0,
can you help me with this ? I don't know what to do .
Wish your reply