Mautic 2.0.1 error upgrade to 2.1

Product Support
1

When updating the point where unpacks the downloaded package throws this error log and update falls. They suspect someone where to look for solutions?

Code:
[2016-08-13 21:59:27] mautic.NOTICE: PHP Notice: Use of undefined constant PHPEXCEL_ROOT - assumed 'PHPEXCEL_ROOT' - in file /XXXXXXXXXX/mtc/vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/ZipArchive.php - at line 31 [] []
2

When updating the point where unpacks the downloaded package throws this error log and update falls. They suspect someone where to look for solutions?

[2016-08-13 21:59:27] mautic.NOTICE: PHP Notice: Use of undefined constant PHPEXCEL_ROOT - assumed 'PHPEXCEL_ROOT' - in file /XXXXXXXXXX/mtc/vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/ZipArchive.php - at line 31 [] []

3

Anyone not think of anything?

4

solution was to install on a server php-zip 7.0