Warning: simplexml_load_file(): I/O warning : failed to load external entity "/var/www/symfony/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/Resources/config/doctrine/User.orm.xml" in /var/www/symfony/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php on line 814

Fatal error: Uncaught Doctrine\Common\Persistence\Mapping\MappingException: Invalid mapping file 'FOS.UserBundle.Entity.User.orm.xml' for class 'FOS\UserBundle\Entity\User'. in /var/www/symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/MappingException.php:86 Stack trace: #0 /var/www/symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/Driver/FileDriver.php(117): Doctrine\Common\Persistence\Mapping\MappingException::invalidMappingFile('FOS\\UserBundle\\...', 'FOS.UserBundle....') #1 /var/www/symfony/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php(58): Doctrine\Common\Persistence\Mapping\Driver\FileDriver->getElement('FOS\\UserBundle\\...') #2 /var/www/symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/Driver/MappingDriverChain.php(102): Doctrine\ORM\Mapping\Driver\XmlDriver->loadMetadataForClass('FOS\\UserBundle\\...', Object(Doctrine\ORM\Mapping\ClassMetadata)) #3 /var/www/symfony/vendor/doctrine/orm/lib/Doctrine/ORM/Mapping/ClassMetadataFactory in /var/www/symfony/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/MappingException.php on line 86