error

• Deprecated function: trim(): Passing null to parameter #1 ($string) of type string is deprecated in Drupal\robotstxt\Controller\RobotsTxtController->content() (line 71 of modules/contrib/robotstxt/src/Controller/RobotsTxtController.php).

  Drupal\robotstxt\Controller\RobotsTxtController->content()
  call_user_func_array() (Line: 123)
  Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 634)
  Drupal\Core\Render\Renderer::Drupal\Core\Render\{closure}()
  Fiber->start() (Line: 635)
  Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121)
  Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)
  Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 183)
  Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
  Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 54)
  Drupal\simple_oauth\HttpMiddleware\BasicAuthSwap->handle() (Line: 53)
  Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
  Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
  Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 203)
  Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 140)
  Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 89)
  Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
  Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
  Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 38)
  Drupal\mercury_editor\StackMiddleware\AjaxPageState->handle() (Line: 53)
  Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 54)
  Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 745)
  Drupal\Core\DrupalKernel->handle() (Line: 19)
  

• Warning: uniandes_eventtia_views_post_render(): Argument #3 ($cache) must be passed by reference, value given in Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}() (line 389 of core/lib/Drupal/Core/Extension/ModuleHandler.php).

  Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}() (Line: 340)
  Drupal\Core\Extension\ModuleHandler->invokeAllWith() (Line: 388)
  Drupal\Core\Extension\ModuleHandler->invokeAll() (Line: 1598)
  Drupal\views\ViewExecutable->render() (Line: 201)
  Drupal\views\Plugin\views\display\Page->execute() (Line: 1686)
  Drupal\views\ViewExecutable->executeDisplay() (Line: 80)
  Drupal\views\Element\View::preRenderViewElement()
  call_user_func_array() (Line: 107)
  Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 910)
  Drupal\Core\Render\Renderer->doCallback() (Line: 441)
  Drupal\Core\Render\Renderer->doRender() (Line: 230)
  Drupal\Core\Render\Renderer->render() (Line: 242)
  Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 634)
  Drupal\Core\Render\Renderer::Drupal\Core\Render\{closure}()
  Fiber->resume() (Line: 649)
  Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 235)
  Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 131)
  Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
  Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray() (Line: 246)
  Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure}() (Line: 206)
  Symfony\Component\EventDispatcher\EventDispatcher->callListeners() (Line: 56)
  Symfony\Component\EventDispatcher\EventDispatcher->dispatch() (Line: 188)
  Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
  Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 54)
  Drupal\simple_oauth\HttpMiddleware\BasicAuthSwap->handle() (Line: 53)
  Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
  Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
  Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 118)
  Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 92)
  Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
  Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
  Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 38)
  Drupal\mercury_editor\StackMiddleware\AjaxPageState->handle() (Line: 53)
  Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 54)
  Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 745)
  Drupal\Core\DrupalKernel->handle() (Line: 19)
  

• Warning: uniandes_eventtia_views_post_render(): Argument #3 ($cache) must be passed by reference, value given in Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}() (line 389 of core/lib/Drupal/Core/Extension/ModuleHandler.php).

  Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}() (Line: 340)
  Drupal\Core\Extension\ModuleHandler->invokeAllWith() (Line: 388)
  Drupal\Core\Extension\ModuleHandler->invokeAll() (Line: 1598)
  Drupal\views\ViewExecutable->render() (Line: 119)
  Drupal\views\Plugin\views\display\Block->execute() (Line: 1686)
  Drupal\views\ViewExecutable->executeDisplay() (Line: 80)
  Drupal\views\Element\View::preRenderViewElement() (Line: 65)
  Drupal\views\Plugin\Block\ViewsBlock->build() (Line: 212)
  Drupal\block\BlockViewBuilder::preRender()
  call_user_func_array() (Line: 107)
  Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 910)
  Drupal\Core\Render\Renderer->doCallback() (Line: 441)
  Drupal\Core\Render\Renderer->doRender() (Line: 253)
  Drupal\Core\Render\Renderer->doRenderRoot() (Line: 143)
  Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 634)
  Drupal\Core\Render\Renderer::Drupal\Core\Render\{closure}()
  Fiber->resume() (Line: 649)
  Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 142)
  Drupal\Core\Render\Renderer->renderInIsolation() (Line: 169)
  Drupal\Core\Render\Renderer->doRenderPlaceholder() (Line: 760)
  Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}()
  Fiber->resume() (Line: 771)
  Drupal\Core\Render\Renderer->replacePlaceholders() (Line: 265)
  Drupal\Core\Render\Renderer->doRenderRoot() (Line: 143)
  Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 634)
  Drupal\Core\Render\Renderer::Drupal\Core\Render\{closure}()
  Fiber->resume() (Line: 649)
  Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 142)
  Drupal\Core\Render\Renderer->renderInIsolation() (Line: 113)
  Drupal\Core\Render\Renderer->renderRoot() (Line: 253)
  Drupal\Core\Render\HtmlResponseAttachmentsProcessor->renderPlaceholders() (Line: 93)
  Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments() (Line: 45)
  Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond() (Line: 246)
  Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure}() (Line: 206)
  Symfony\Component\EventDispatcher\EventDispatcher->callListeners() (Line: 56)
  Symfony\Component\EventDispatcher\EventDispatcher->dispatch() (Line: 216)
  Symfony\Component\HttpKernel\HttpKernel->filterResponse() (Line: 204)
  Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
  Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 54)
  Drupal\simple_oauth\HttpMiddleware\BasicAuthSwap->handle() (Line: 53)
  Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
  Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
  Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 118)
  Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 92)
  Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
  Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
  Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 38)
  Drupal\mercury_editor\StackMiddleware\AjaxPageState->handle() (Line: 53)
  Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 54)
  Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 745)
  Drupal\Core\DrupalKernel->handle() (Line: 19)