Help with: AttributeError: 'DataFrame' object has no attribute 'account_value

I am getting the following error "AttributeError: 'DataFrame' object has no attribute 'account_value'" when running backtesting from https://github.com/llSourcell/ChatGPT_Trading_Bot/blob/main/tradingBot.ipynb

I read this may be an issue with with dataframe no longer support append, and have tried to edit the code using concat, but without success. Any help welcome... I'm a noob so go easy, simplify :) . Any examples including links to similar issues welcome.