on https://react-hook-form.com/faqs#watchvsgetValuesvsstate there is link to codesandbox that includes old link to page that doesnt exist: <a href="https://react-hook-form.com/api#watch">https://react-hook-form.com/api#watch</a> need to change link from https://react-hook-form.com/api#watch to actual link https://react-hook-form.com/docs/useform/watch