llama2 7b SFT met error

[inspurasc]

Hi ,
I am run the llama2 7b SFT test refernce below link:
https://docs.nvidia.com/nemo-framework/user-guide/latest/playbooks/llama2sft.html

When run the SFT finetuning script, I met below error:

May I ask how to solve it？ thanks.