AttributeError: 'SmilesClassificationModel' object has no attribute 'loss_fct'

[LinPXi]

Hello, I would like to ask you a question, I sent the screenshot, can you take a look at it for me, the first picture is an error report, the second picture is that I slightly changed the code, but the main problem is the first An error message for a picture. AttributeError: 'SmilesClassificationModel' object has no attribute 'loss_fct'

[LinPXi]

I would really appreciate it if you could help me out with this.