Fatal error: Uncaught exception 'Exception'

[mikecastrodemaria]

After installing compser I do the php ./genericGetter.php

This is the résult :

Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct(): It is not safe to rely on the system's timezone settings. You are required to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected the timezone 'UTC' for now, but please set date.timezone to select your timezone.' in /Users/mike/Documents/...../SellerCenterSDK-PHP-master/src/RocketLabs/SellerCenterSdk/Core/Request/Timestamp/TimestampFormatter.php:18
Stack trace:
#0 /....../SellerCenterSDK-PHP-master/src/RocketLabs/SellerCenterSdk/Core/Request/Timestamp/TimestampFormatter.php(18): DateTime->__construct()
#1 /....../SellerCenterSDK-PHP-master/src/RocketLabs/SellerCenterSdk/Core/Client.php(130): RocketLabs\SellerCenterSdk\Core\Request\Timestamp\TimestampFormatter->getFormattedTimestamp()
#2 in /....../SellerCenterSDK-PHP-master/src/RocketLabs/SellerCenterSdk/Core/Request/Timestamp/TimestampFormatter.php on line 18