PHP Fatal error:  Call to a member function attribute() on a non-object in /var/www/html/ezpublish5/ezpublish_legacy/kernel/search/plugins/ezsearchengine/ezsearchengine.php on line 53
PHP Stack trace:
PHP   1. {main}() /var/www/html/ezpublish5/ezpublish/console:0
PHP   2. Symfony\Component\Console\Application->run() /var/www/html/ezpublish5/ezpublish/console:27
PHP   3. eZ\Bundle\EzPublishCoreBundle\Console\Application->doRun() /var/www/html/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/Console/Application.php:121
PHP   4. Symfony\Bundle\FrameworkBundle\Console\Application->doRun() /var/www/html/ezpublish5/vendor/ezsystems/ezpublish-kernel/eZ/Bundle/EzPublishCoreBundle/Console/Application.php:41
PHP   5. Symfony\Component\Console\Application->doRun() /var/www/html/ezpublish5/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Console/Application.php:96
PHP   6. Symfony\Component\Console\Application->doRunCommand() /var/www/html/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/Console/Application.php:191
PHP   7. Symfony\Component\Console\Command\Command->run() /var/www/html/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/Console/Application.php:904
PHP   8. EzSystems\TestSystemBundle\Command\Issues\Ezp21870FatalErrorWhenDeletingLocationCommand->execute() /var/www/html/ezpublish5/vendor/symfony/symfony/src/Symfony/Component/Console/Command/Command.php:244
PHP   9. eZ\Publish\Core\SignalSlot\LocationService->deleteLocation() /var/www/html/ezpublish5/src/EzSystems/TestSystemBundle/Command/Issues/Ezp21870FatalErrorWhenDeletingLocationCommand.php:126
PHP  10. eZ\Publish\Core\SignalSlot\SignalDispatcher\DefaultSignalDispatcher->emit() /var/www/html/ezpublish5/vendor/ezsystems/ezpublish-kernel/eZ/Publish/Core/SignalSlot/LocationService.php:330
PHP  11. eZ\Publish\Core\SignalSlot\Slot\LegacyDeleteLocationSlot->receive() /var/www/html/ezpublish5/vendor/ezsystems/ezpublish-kernel/eZ/Publish/Core/SignalSlot/SignalDispatcher/DefaultSignalDispatcher.php:84
PHP  12. eZ\Publish\Core\MVC\Legacy\Kernel->runCallback() /var/www/html/ezpublish5/vendor/ezsystems/ezpublish-kernel/eZ/Publish/Core/SignalSlot/Slot/LegacyDeleteLocationSlot.php:46
PHP  13. ezpKernel->runCallback() /var/www/html/ezpublish5/vendor/ezsystems/ezpublish-kernel/eZ/Publish/Core/MVC/Legacy/Kernel.php:106
PHP  14. eZ\Publish\Core\MVC\Legacy\Kernel\CLIHandler->runCallback() /var/www/html/ezpublish5/ezpublish_legacy/kernel/private/classes/ezpkernel.php:68
PHP  15. eZ\Publish\Core\SignalSlot\Slot\{closure}() /var/www/html/ezpublish5/vendor/ezsystems/ezpublish-kernel/eZ/Publish/Core/MVC/Legacy/Kernel/CLIHandler.php:130
PHP  16. eZContentOperationCollection::registerSearchObject() /var/www/html/ezpublish5/vendor/ezsystems/ezpublish-kernel/eZ/Publish/Core/SignalSlot/Slot/LegacyDeleteLocationSlot.php:41
PHP  17. eZSearch::addObject() /var/www/html/ezpublish5/ezpublish_legacy/kernel/content/ezcontentoperationcollection.php:595
PHP  18. eZSearchEngine->addObject() /var/www/html/ezpublish5/ezpublish_legacy/kernel/classes/ezsearch.php:109