`<RichText />` links are returning “Cannot read property \‘target\’ of undefined”

Developing with Prismic
2

Custom serialisers only have 4 arguments -

function htmlSerialiser (type, element, content, children) {
  if (type === 'hyperlink') {
    return (
      <a href={PrismicDOM.Link.url(element.data, linkResolver)}>
        {content}
      </a>
    )
  } else {
    return null
  }
}

That error sounds like you aren’t passing in the right value into the link, however. Can you console.log the page data, and what you are passing in to the <RichText /> component?