ERROR: invalid_parameter -{"reason":"invalid_parameter","name":"parent","message":"Invalid value 'd_**********'. 'parent' with value 'd_**********' not found"}]

$curl = curl_init();

                    $url = 'https://upload.box.com/api/2.0/files/content';

                    curl_setopt($curl,CURLOPT_URL, $url);

                    curl_setopt($curl, CURLOPT_HTTPHEADER, array(

                        'Authorization: Bearer '.$access_token,

                        'Content-Type: multipart/form-data'

                    ));

                    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);          

                    curl_setopt($curl, CURLOPT_POSTFIELDS, array('attributes' => '{"name": "'.$this->fileName.'", "parent": {"id": "'.$this->folderId.'"}}','file'=> new CURLFILE((string) $fileFullpath, 'text/csv', $this->fileName)) );

                    $response = curl_exec($curl);

                    curl_close($curl);                

                    echo '<pre>';

                    var_dump($response);