Trouble getting Static Form Pages Plugin working with KV on Astro Site

import staticFormsPlugin from "@cloudflare/pages-plugin-static-forms";

export const onRequest: PagesFunction = staticFormsPlugin({
  respondWith: ({ formData, name }) => {
    const email = formData.get('email')
    return new Response(`Hello, ${email}! Thank you for submitting the ${name} form.`)
  }
});

  "exceptions": [
    {
      "name": "ReferenceError",
      "message": "formSubmissions is not defined",
      "timestamp": 1709656550205
    }
  ],

import staticFormsPlugin from "@cloudflare/pages-plugin-static-forms";


export const onRequest: PagesFunction = staticFormsPlugin({
  respondWith: async ({ formData, name }) => {
    const email = formData.get('email');

    // Serialize the formData if you have multiple fields or need to store it as a JSON object
    const dataToStore = JSON.stringify({ email: email });

    // Create a unique identifier for this submission
    const submissionId = new Date().toISOString();

    // Save the serialized data to your KV namespace
    await formSubmissions.put(`submission-${submissionId}`, dataToStore);

    // Return a response to the user
    return new Response(`Hello, ${email}! Thank you for submitting the ${name} form. Your submission has been saved.`);
  }
});