Model name 'bert-large-uncased' was not found in model name list (bert-base-uncased, bert-large-uncased, bert-base-cased, bert-large-cased, bert-base-multilingual-uncased, bert-base-multilingual-cased, bert-base-chinese).

can you help me ?
D:\xlnet-Pytorch-master>python main.py
Model name 'bert-large-uncased' was not found in model name list (bert-base-uncased, bert-large-uncased, bert-base-cased, bert-large-cased, bert-base-multilingual-uncased, bert-base-multilingual-cased, bert-base-chinese). We assumed 'https://s3.amazonaws.com/models.huggingface.co/bert/bert-large-uncased-vocab.txt' was a path or url but couldn't find any file associated to this path or url.
Traceback (most recent call last):
File "main.py", line 58, in
model = xlnet.XLNet(n_token=len(sp.vocab), n_layer=6, n_head=4, d_head=8,
AttributeError: 'NoneType' object has no attribute 'vocab'