/usr/share/php/Symfony/Component/Form/Exception/ is in php-symfony-form 2.7.10-0ubuntu2.
This file is owned by root:root, with mode 0o755.
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/usr/share/php/Symfony/Component/Form/Exception/AlreadyBoundException.php
/usr/share/php/Symfony/Component/Form/Exception/AlreadySubmittedException.php
/usr/share/php/Symfony/Component/Form/Exception/BadMethodCallException.php
/usr/share/php/Symfony/Component/Form/Exception/ErrorMappingException.php
/usr/share/php/Symfony/Component/Form/Exception/ExceptionInterface.php
/usr/share/php/Symfony/Component/Form/Exception/InvalidArgumentException.php
/usr/share/php/Symfony/Component/Form/Exception/InvalidConfigurationException.php
/usr/share/php/Symfony/Component/Form/Exception/LogicException.php
/usr/share/php/Symfony/Component/Form/Exception/OutOfBoundsException.php
/usr/share/php/Symfony/Component/Form/Exception/RuntimeException.php
/usr/share/php/Symfony/Component/Form/Exception/StringCastException.php
/usr/share/php/Symfony/Component/Form/Exception/TransformationFailedException.php
/usr/share/php/Symfony/Component/Form/Exception/UnexpectedTypeException.php