I'm getting an error in "Serverless Function" in my SvelteKit Project often

<script context="module">
    export async function load({ page, fetch }) {
        const pagination = page.query.get('page') ?? 1;

        let PER_PAGE = 2;
        // calculate start page
        let startPage = +pagination === 1 ? 0 : (+pagination - 1) * PER_PAGE;

        // fetch total/count
        const totalUrl = `https://myblog.herokuapp.com/posts/count`;
        const totalRes = await fetch(totalUrl);

        // fecth articles
        const url = `https://sveltestrapiblog.herokuapp.com/posts?_sort=created_at:DESC&_start=${startPage}&_limit=${PER_PAGE}`;

        const articelRes = await fetch(url);

        if (articelRes.ok && totalRes.ok) {
            return {
                props: {
                    posts: await articelRes.json(),
                    total: await totalRes.json(),
                    pagination: +pagination
                }
            };
        }

        return {
            status: articelRes.status,
            error: new Error(`Could not load ${url}`)
        };
    }
</script>