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InvalidArgumentException: The URI 'casa-editrice/leicester-university-press' is invalid. You must use a valid URI scheme. in Drupal\Core\Url::fromUri() (line 290 of core/lib/Drupal/Core/Url.php).
Drupal\link\Plugin\Field\FieldType\LinkItem->getUrl() (Line: 241)
Drupal\link\Plugin\Field\FieldFormatter\LinkFormatter->buildUrl(Object) (Line: 179)
Drupal\link\Plugin\Field\FieldFormatter\LinkFormatter->viewElements(Object, 'en') (Line: 89)
Drupal\Core\Field\FormatterBase->view(Object, 'en') (Line: 263)
Drupal\Core\Entity\Entity\EntityViewDisplay->buildMultiple(Array) (Line: 351)
Drupal\Core\Entity\EntityViewBuilder->buildComponents(Array, Array, Array, 'rss') (Line: 24)
Drupal\node\NodeViewBuilder->buildComponents(Array, Array, Array, 'rss') (Line: 293)
Drupal\Core\Entity\EntityViewBuilder->buildMultiple(Array) (Line: 250)
Drupal\Core\Entity\EntityViewBuilder->build(Array)
call_user_func_array(Array, Array) (Line: 100)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. Support for this callback implementation is deprecated in 8.8.0 and will be removed in Drupal 9.0.0. See https://www.drupal.org/node/2966725', 'silenced_deprecation', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 781)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 372)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 200)
Drupal\Core\Render\Renderer->render(Array) (Line: 920)
template_preprocess_views_view_row_rss(Array, 'views_view_row_rss', Array) (Line: 287)
Drupal\Core\Theme\ThemeManager->render('views_view_row_rss', Array) (Line: 431)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 444)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 200)
Drupal\Core\Render\Renderer->render(Array) (Line: 501)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 85)
__TwigTemplate_8f6495611dfd27264d88cd97bda2f9817a021e4a29c6b9baf8560e85664f7592->doDisplay(Array, Array) (Line: 455)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 422)
Twig\Template->display(Array) (Line: 434)
Twig\Template->render(Array) (Line: 64)
twig_render_template('core/themes/classy/templates/views/views-view-rss.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('views_view_rss', Array) (Line: 431)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 444)
Drupal\Core\Render\Renderer->doRender(Array, 1) (Line: 200)
Drupal\Core\Render\Renderer->render(Array, 1) (Line: 144)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 573)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 145)
Drupal\Core\Render\Renderer->renderRoot(Array) (Line: 109)
Drupal\views\Plugin\views\display\Feed::buildResponse('taxonomy_term', 'feed_1', Array) (Line: 53)
Drupal\views\Routing\ViewPageController->handle('taxonomy_term', 'feed_1', Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 573)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 151)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->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: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)