The website encountered an unexpected error. Please try again later.

After you enable the module and then go to the admin/reports/status Report page, you receive a critical error «The website encountered an unexpected error. Please try again later.» on a white background.
An error is logged in the admin/reports/dblog log.

Error: Call to undefined function l() в shadowbox_requirements() (строка 22 из D:\OSPanel\domains\sitename\modules\shadowbox\shadowbox.install) #0 [internal function]: shadowbox_requirements('runtime') #1 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\Extension\ModuleHandler.php(403): call_user_func_array('shadowbox_requi...', Array) #2 D:\OSPanel\domains\sitename\core\modules\system\src\SystemManager.php(112): Drupal\Core\Extension\ModuleHandler->invokeAll('requirements', Array) #3 D:\OSPanel\domains\sitename\core\modules\system\src\Controller\SystemInfoController.php(49): Drupal\system\SystemManager->listRequirements() #4 [internal function]: Drupal\system\Controller\SystemInfoController->status() #5 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array) #6 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\Render\Renderer.php(582): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #7 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #8 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) #9 D:\OSPanel\domains\sitename\vendor\symfony\http-kernel\HttpKernel.php(151): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #10 D:\OSPanel\domains\sitename\vendor\symfony\http-kernel\HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #11 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\StackMiddleware\Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #12 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\StackMiddleware\KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #13 D:\OSPanel\domains\sitename\core\modules\page_cache\src\StackMiddleware\PageCache.php(106): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #14 D:\OSPanel\domains\sitename\core\modules\page_cache\src\StackMiddleware\PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #15 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\StackMiddleware\ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #16 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\StackMiddleware\NegotiationMiddleware.php(52): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #17 D:\OSPanel\domains\sitename\vendor\stack\builder\src\Stack\StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #18 D:\OSPanel\domains\sitename\core\lib\Drupal\Core\DrupalKernel.php(693): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #19 D:\OSPanel\domains\sitename\index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #20 {main}.