How to use the correct formula to generate features?

Hello, I have a question. I used to generate features with this type of formula without error.
But now that I use a formula with such an NCM structure, an error occurs when generating features.
Here is the package I used to generate the feature. When I use the IonProperty() function, I get the following error.

Do I need to change the formula I’m using now, or how? Thank you

My suggestion would be to convert your formulas to integer first using https://pymatgen.orgpymatgen.core.html/#pymatgen.core.composition.Composition.get_integer_formula_and_factor