Error with Gatsby plugin Gatsby-Source-Wordpress

[admin]

I'm trying to setup my first gatsby + wordpress site. I'm following <a href="https://www.gatsbyjs.org/blog/2019-...h-wordpress-and-gatsby-part-2/#reach-skip-nav" rel="nofollow noreferrer">this</a> tutorial.

I get the site running but at the point where I should get the data from WP I get stuck. I added Gatsby-Source-Wordpress plugin. After I restarted site it throws this error:

success open and validate gatsby-configs - 0.102 s
success load plugins - 0.631 s
success onPreInit - 0.019 s
success initialize cache - 0.053 s
success copy gatsby files - 0.161 s
success onPreBootstrap - 0.040 s
info Creating GraphQL type definition for File

Path: /wp-json
The server response was "404 Not Found"

 ERROR #11321  PLUGIN

"gatsby-source-wordpress" threw an error while running the sourceNodes lifecycle:

Cannot read property 'data' of undefined



  TypeError: Cannot read property 'data' of undefined

  - fetch.js:141 fetch
    [gatsby-wordpress]/[gatsby-source-wordpress]/fetch.js:141:21

  - next_tick.js:68 process._tickCallback
    internal/process/next_tick.js:68:7


warn The gatsby-source-wordpress plugin has generated no Gatsby nodes. Do you need it?
success source and transform nodes - 0.327 s
success building schema - 0.404 s
success createPages - 0.019 s
success createPagesStatefully - 0.090 s
success onPreExtractQueries - 0.022 s
success update schema - 0.079 s
success extract queries from components - 0.595 s
success write out requires - 0.103 s
success write out redirect data - 0.032 s
success Build manifest and related icons - 0.263 s
success onPostBootstrap - 0.308 s
⠀
info bootstrap finished - 6.617 s
⠀
success run static queries - 0.105 s — 3/3 36.11 queries/second
success run page queries - 0.044 s — 5/5 230.97 queries/second
 DONE  Compiled successfully in 4851ms                                                           10:46:42 AM
⠀
You can now view gatsby-starter-default in the browser.
⠀
  http://localhost:8000/
⠀
View GraphiQL, an in-browser IDE, to explore your site's data and schema
⠀
  http://localhost:8000/___graphql
⠀
Note that the development build is not optimized.
To create a production build, use npm run build
⠀
ℹ ｢wdm｣:
ℹ ｢wdm｣: Compiled successfully.

I run WP locally with Mamp and I'm able to see JSON data here: <a href="http://localhost:8888/GatsbyWP/wp-json/" rel="nofollow noreferrer">http://localhost:8888/GatsbyWP/wp-json/</a> .

Here's my gatsby-config.js file:

module.exports = {
  siteMetadata: {
    title: `Gatsby wordpress test`,
    description: `Testing...`,
    author: `@gatsbyjs`,
  },
  plugins: [
    `gatsby-plugin-react-helmet`,
    {
      resolve: `gatsby-source-filesystem`,
      options: {
        name: `images`,
        path: `${__dirname}/src/images`,
      },
    },
    `gatsby-transformer-sharp`,
    `gatsby-plugin-sharp`,
    {
      resolve: `gatsby-plugin-manifest`,
      options: {
        name: `gatsby-starter-default`,
        short_name: `starter`,
        start_url: `/`,
        background_color: `#663399`,
        theme_color: `#663399`,
        display: `minimal-ui`,
        icon: `src/images/gatsby-icon.png`,
      },
    },
    {
      resolve: "gatsby-source-wordpress",
      options: {

        baseUrl: `localhost:8888`,

        protocol: `http`,

        hostingWPCOM: false,

        useACF: true,
      },
    },
    `gatsby-plugin-sitemap`,
  ],
}

I'm stuck and don't have any clue what to do now. I found that other people had similar issue than this but didn't find any good answers or direction where to try figure out my problem.

Thanks in advance!