TypeError: Cannot read properties of null (reading 'dataset')

Hi. Please, help me. I do everiting review and can´t resolve. In this form I use choice_filter but works ok until a unknown last change.

Welcome to the community, @palegriaz! Could you kindly share with us a screenshot of your issue so that we could understand it pictorially?

Thanks. This mistake was resolve. Now I have another. Will make a new post.