>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3179765. --> Reported by: [Christopher Riley](https://www.drupal.org/user/592880) >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>When I enable the module on a fresh 9 install I get the following warnings:</p> <p>-&gt; drush en error_page -y<br> [warning] Declaration of Drupal\error_page\EventSubscriber\ErrorPageExceptionLoggingSubscriber::onError(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event): void should be compatible with Drupal\Core\EventSubscriber\ExceptionLoggingSubscriber::onError(Symfony\Component\HttpKernel\Event\ExceptionEvent $event) ErrorPageExceptionLoggingSubscriber.php:44<br> [warning] Declaration of Drupal\error_page\EventSubscriber\ErrorPageFinalExceptionSubscriber::onException(Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event): void should be compatible with Drupal\Core\EventSubscriber\FinalExceptionSubscriber::onException(Symfony\Component\HttpKernel\Event\ExceptionEvent $event) ErrorPageFinalExceptionSubscriber.php:100<br> [success] Successfully enabled: error_page</p> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <p>Install via commandline</p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <h3 id="summary-ui-changes">User interface changes</h3> <h3 id="summary-api-changes">API changes</h3> <h3 id="summary-data-model-changes">Data model changes</h3>