Fatal error: Uncaught Error: Class "PHPePub\Core\Logger" not found in /home/sylvainlj/bag/vendor/grandt/phpepub/tests/EPub.Example3_1.php:33 Stack trace: #0 {main} thrown in /home/sylvainlj/bag/vendor/grandt/phpepub/tests/EPub.Example3_1.php on line 33