Does not return in execption status and message

wp-content/plugins/woocommerce-gateway-klarna/vendor/klarna/checkout/src/Klarna/Checkout/BasicConnector.php

    protected function verifyResponse(Klarna_Checkout_HTTP_Response $result)
    {
        // Error Status Code recieved. Throw an exception.
        if ($result->getStatus() >= 400 && $result->getStatus() <= 599) {

            $json = json_decode($result->getData(), true);
            $payload = ($json && is_array($json)) ? $json : array();

            var_dump($result->getStatus(), $payload);
            throw new Klarna_Checkout_ApiErrorException(
                "API Error", $result->getStatus(), $payload
            );
        }
    }

Is not throwing status code and payload message

Its class chain inheritance chain below (from last to processor):
<?php
/**
 * Copyright 2015 Klarna AB
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * File containing the Klarna_Checkout_ConnectorException class
 *
 * PHP version 5.3
 *
 * @category  Payment
 * @package   Klarna_Checkout
 * @author    Klarna <[email protected]>
 * @copyright 2015 Klarna AB
 * @license   http://www.apache.org/licenses/LICENSE-2.0 Apache license v2.0
 * @link      http://developers.klarna.com/
 */

/**
 * Api Error exception
 *
 * @category  Payment
 * @package   Klarna_Checkout
 * @author    Matthias Feist <[email protected]>
 * @copyright 2015 Klarna AB
 * @license   http://www.apache.org/licenses/LICENSE-2.0 Apache license v2.0
 * @link      http://developers.klarna.com/
 */
class Klarna_Checkout_ApiErrorException extends Klarna_Checkout_Exception
{
    /**
     * Payload of the error
     *
     * @var array
     */
    protected $payload = array();

    /**
     * Custom contructor
     *
     * @param string    $message  Error message
     * @param int       $code     Error code
     * @param Array     $payload  Payload
     * @param Exception $previous Previous Exception
     */
    public function __construct(
        $message,
        $code,
        Array $payload = array(),
        Exception $previous = null
    ) {
        parent::__construct($message, $code, $previous);
        $this->payload = $payload;
    }

    /**
     * Gets the payload
     *
     * @return array
     */
    public function getPayload()
    {
        return $this->payload;
    }
}


<?php
/**
 * Copyright 2015 Klarna AB
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * File containing the Klarna_Checkout_Exception class
 *
 * PHP version 5.3
 *
 * @category  Payment
 * @package   Klarna_Checkout
 * @author    Klarna <[email protected]>
 * @copyright 2015 Klarna AB
 * @license   http://www.apache.org/licenses/LICENSE-2.0 Apache license v2.0
 * @link      http://developers.klarna.com/
 */

/**
 * Basic exception class
 *
 * @category  Payment
 * @package   Klarna_Checkout
 * @author    Majid G. <[email protected]>
 * @author    David K. <[email protected]>
 * @copyright 2015 Klarna AB
 * @license   http://www.apache.org/licenses/LICENSE-2.0 Apache license v2.0
 * @link      http://developers.klarna.com/
 */
class Klarna_Checkout_Exception extends Exception
{

}


Core_c.php
class Exception implements Throwable {
    protected $message;
    protected $code;
    protected $file;
    protected $line;


    /**
     * Clone the exception
     * @link http://php.net/manual/en/exception.clone.php
     * @return void
     * @since 5.1.0
     */
    final private function __clone() { }

    /**
     * Construct the exception. Note: The message is NOT binary safe.
     * @link http://php.net/manual/en/exception.construct.php
     * @param string $message [optional] The Exception message to throw.
     * @param int $code [optional] The Exception code.
     * @param Exception $previous [optional] The previous exception used for the exception chaining. Since 5.3.0
     * @since 5.1.0
     */
    public function __construct($message = "", $code = 0, Exception $previous = null) { }
...