Deprecated function: Return type of Suin\RSSWriter\SimpleXMLElement::addChild($name, $value = null, $namespace = null) should either be compatible with SimpleXMLElement::addChild(string $qualifiedName, ?string $value = null, ?string $namespace = null): ?SimpleXMLElement, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in include() (line 571 of /var/app/vendor/composer/ClassLoader.php).
include('/var/app/web/core/includes/bootstrap.inc') (Line: 571)
Composer\Autoload\includeFile('/var/app/vendor/composer/../suin/php-rss-writer/src/Suin/RSSWriter/SimpleXMLElement.php') (Line: 428)
Composer\Autoload\ClassLoader->loadClass('Suin\RSSWriter\SimpleXMLElement') (Line: 33)
Suin\RSSWriter\Feed->render() (Line: 272)
Drupal\uclouvain_news\Controller\NewsController->siteNewsFeedFromBranchAndAcronym('cran', 'uclouvain')
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 181)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 53)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 741)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
