Cant get template parts data

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Hi all
Im new in Frontity and Im trying to get data of template_parts.
I reed this conversation and tried to do everything as there was mentioned and its not work for me. After that I decide to check REST API data directly and get it by url of my localhost https://localhost/wp-json/wp/v2/template-parts and its not working.
This is the error message which I get:
{"code":"rest_no_route","message":"No route was found matching the URL and request method.","data":{"status":404}}

But for https://frontity.org/wp-json/wp/v2/template-parts its working and there is tons of data.

Why its happening, maybe someone know ? Should I activate something or etc ?

Wordpress Version: 5.9.3
Theme: Twenty Twenty-Two

/packages/my-theme/src/index.js

    state: {
        theme: {
            templates: [ "footer" ]
        },
    },
    actions: {
        theme: {
            beforeSSR: async ({ state, actions }) => {
                await Promise.all(
                    [
                        state.theme.templates.map((slug) =>
                            actions.source.fetch(`/wp_template_part/${slug}`)
                        ),
                    ]
                );
            },
        },
    },

front/packages/my-theme/src/components/index.js

import React from "react"
import { connect } from "frontity"

const Root = ({ state }) => {
    const data = state.source.get(state.router.link)
    const footer = state.source.get("/wp_template_part/footer")
    console.log(footer);

    return (
        <>
            <h1>Hello Frontity</h1>
            <p>Current URL: {state.router.link}</p>
        </>
    )
}

export default connect(Root)

front/frontity.settings.js

      "state": {
        "source": {
          "url": "http://localhost/",
          postTypes: [
            {
              type: "/wp_template_part",
              endpoint: "template-parts",
            },
          ],
        }
      }