Please provide a [Minimal, Complete, and Verifiable example](http://stackoverflow.com/help/mcve) of code that exhibits the issue without relying on an external Excel file or a web server:
```php
<?php
require __DIR__ . '/vendor/autoload.php';
// Create new Spreadsheet object
$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
// add code that show the issue here...
```
### Which versions of PhpSpreadsheet and PHP are affected?