Head Failing

testDynamicEntityReferenceAutoCreate is failing see https://qa.drupal.org/pifr/test/806408 complete backtrace
Twig_Error_Runtime: An exception has been thrown during the rendering of a template ("Route "entity.taxonomy_term.canonical" does not exist.") in "core/themes/classy/templates/field/field.html.twig" at line 62. in Twig_Template->displayWithErrorHandling() (line 294 of core/vendor/twig/twig/lib/Twig/Template.php).

Drupal\Core\Routing\UrlGenerator->getRoute('entity.taxonomy_term.canonical')
Drupal\Core\Routing\UrlGenerator->generateFromRoute('entity.taxonomy_term.canonical', Array, Array)
Drupal\Core\Url->toString()
Drupal\Core\Utility\LinkGenerator->generate('tag', Object)
Drupal::l('tag', Object)
Drupal\Core\Render\Element\Link::preRenderLink(Array)
call_user_func(Array, Array)
Drupal\Core\Render\Renderer->doRender(Array, )
Drupal\Core\Render\Renderer->render(Array, )
drupal_render(Array)
render(Array)
twig_drupal_escape_filter(Object, Array, 'html', NULL, 1)
__TwigTemplate_d61936aa4376fe766e73fef9bd6185c679d61246341e02106da382d0083375eb->doDisplay(Array, Array)
Twig_Template->displayWithErrorHandling(Array, Array)
Twig_Template->display(Array)
Twig_Template->render(Array)
twig_render_template('core/themes/classy/templates/field/field.html.twig', Array)
Drupal\Core\Theme\ThemeManager->theme('field', Array)
Drupal\Core\Theme\ThemeManager->render('field', Array)
Drupal\Core\Render\Renderer->doRender(Array)
Drupal\Core\Render\Renderer->doRender(Array, )
Drupal\Core\Render\Renderer->render(Array, )
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.view', Object)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\PageCache->pass(Object, 1, 1)
Drupal\Core\StackMiddleware\PageCache->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1)
Stack\StackedHttpKernel->handle(Object, 1, 1)
Drupal\Core\DrupalKernel->handle(Object)