I'm trying to grab props from a folder that I have the path to in my root directory. I'm certain that the json parsing is working fine and the helper functions are working fine (I can log them), but getStaticProps() is not able to pass it as a prop. This is my function:

export default function getStaticProps(){
    let allPostData = getSortedPostsData();
    console.log("Im useful!")
    return { props: { allPostData } }
}

And it's within a posts.ts file within a lib/ folder in my root directory. I have also tried running this from the page it is meant to support. Attached is a screenshot of the error I am receiving, and "Im useful!" is never logging. Logging the prop from the react page comes up as undefined as well.
Any help appreciated. Thanks in advance!