AttributeError: 'NoneType' object has no attribute 'lower' while using evaluation (from ragas import evaluate).

[debanshu005]

I'm getting the below error while using evaluate from ragas (from ragas import evaluate).
AttributeError: 'NoneType' object has no attribute 'lower'

[jjmachan]

thanks to @yuukidach this has been significantly improved. Please feel free to reraise this if you encounter this again @debanshu005