Fine-tuning error.

Hey guys,

I'm trying to do finetunning using finGPT.
According to the website https://medium.datadriveninvestor.com/introducing-fingpt-forecaster-the-future-of-robo-advisory-services-50add34e3d3c

it takes 2 steps such as:
1- Prepare Data (prepare_data.ipynb)
2- The Training Process (train_lora.py)

Executing the first step (prepare_data.ipynb) generates two folders, one containing the .csv files and the other containing the .json files, as in the image below


The problem is in the second step:
When executing the train_lora.py file I have the following error AttributeError: 'NoneType' object has no attribute 'strip' , as in the image below


I don't know what else to do... please, could someone help me?
Many thanks!!