REST API v2 /forms/[FORM_ID]/submissions response with page confirmation

api.php

My custom api endpoint:

// Post Gravity Form submission
public static function postGravityForm($request) {
	$data = $request->get_params();

	if (isset($data['form_id'])) {
		$gf_url   = get_rest_url() . 'gf/v2/forms/'. $data['form_id'] .'/submissions';

		// Send request
		$response = wp_remote_request($gf_url,
			array(
				'method'  => 'POST',
				'body'    => json_encode($data),
				'headers' => [
					'Content-type' => 'application/json'
				]
			)
		);
		
		// Results in WP_Error
		print_r($response);

		// Format response
		$code    = wp_remote_retrieve_response_code($response);
		$body    = wp_remote_retrieve_body($response);
		$message = wp_remote_retrieve_response_message($response);

		return $body;

	} else {
		return new WP_Error('401', __('Your request is invalid.', 'headless-wp'));
	}
}


Response from endpoint:


WP_Error Object
(
    [errors
] => Array
        (
            [http_request_failed
] => Array
                (
                    [
    0
] => cURL error 7: Failed to connect to mydomain.test port 3000: Connection refused
                )

        )

    [error_data
] => Array
        (
        )

)