error.json is nota function

[devadee]

I am trying to create an API in Typescript using the plugin. but i am getting the error :

TypeError: error.json is not a function
    at getErrorMessage (D:\personal\projects\blogger\node_modules\wordpress-api-client\dist\util.js:35:30)
    at FetchClient.fetch (D:\personal\projects\blogger\node_modules\wordpress-api-client\dist\fetch-client.js:54:62)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
    at FetchClient.post (D:\personal\projects\blogger\node_modules\wordpress-api-client\dist\fetch-client.js:90:17)
    at NewsService.blogHandler (D:\personal\projects\blogger\src\news\news.service.ts:35:22)
    at NewsController.getNews (D:\personal\projects\blogger\src\news\news.controller.ts:10:22)
    at D:\personal\projects\blogger\node_modules\@nestjs\core\router\router-execution-context.js:46:28
    at D:\personal\projects\blogger\node_modules\@nestjs\core\router\router-proxy.js:9:17
    ```
    
    The code :
    
    ```
   
    const wp = new WpApiClient('https://xxxxxxx.com/wp-json', {
      auth: {
        type: 'basic',
        password: '8FI9 8Uxqd ODB2 szDO JqaI YrPN',
        username: 'user',
      },
    });
    const posts = {
      date_gmt: '2022-01-01T12:34:56',
      date: '2022-01-01T12:34:56',
      guid: {
        raw: 'ttest',
        rendered: 'ttest',
      },
      link: 'https://xxxxx.com/ttest.php',
      modified: '2022-01-01T12:34:56',
      modified_gmt: '2022-01-01T12:34:56',
      type: 'post',
      slug: 'testt',
      title: {
        raw: '<h2>test title</h2>',
        rendered: 'Test Ttitle',
      },
      content: {
        protected: false,
        raw: '<h2>Bpdy test</h2>',
        rendered: 'Bpdy test',
      },
      status: 'publish',
      author: 1,
    };
    return wp
      .post()
      .create(posts)
      .then(function (response) {
        console.log(response);
        return response;
      })
      .catch((err) => {
        console.log(err);
      });
    ```