SvelteKit - Failed to load resource: the server responded with a status of 500 ()

(FORM TAG)
        method="POST"
        action="?/cart"

import { createInstance } from "$lib/js/pocketbase.js";
import { XX_XX, XX_XX } from "$env/static/private";

const pb = createInstance();

export async function load({}) {
  const authData = await pb.collection(*****).authWithPassword(XX_XX, XX_XX);
  authData;

  return {
    authData: pb.authStore.token,
  };
}

export const actions = {
  cart: async ({ request }) => {
    const formData = await request.formData();
    await pb.collection(*****).create(formData);
  },
};