Route file example.fileapi doesn't exist in version 3.

Problem/Motivation

When enabling the file example in version 3.0.2, I get the following error. If anyone has a suggestions for how I might have misinstalled it, please let me know.

Thx.

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "file_example.fileapi" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 208 of core/lib/Drupal/Core/Routing/RouteProvider.php).

Drupal\Core\Routing\UrlGenerator->getRoute() (Line: 271)
Drupal\Core\Routing\UrlGenerator->generateFromRoute() (Line: 105)
Drupal\Core\Render\MetadataBubblingUrlGenerator->generateFromRoute() (Line: 762)
Drupal\Core\Url->toString() (Line: 182)
Drupal\Core\Utility\LinkGenerator->generate() (Line: 95)
Drupal\Core\Render\Element\Link::preRenderLink()
call_user_func_array() (Line: 100)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 781)
Drupal\Core\Render\Renderer->doCallback() (Line: 372)
Drupal\Core\Render\Renderer->doRender() (Line: 200)
Drupal\Core\Render\Renderer->render() (Line: 450)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 100)
__TwigTemplate_62171cf71ddd43ab2c05bcad698bc93e52bfa223eb6e80d9b76d8592530b0b70->doDisplay() (Line: 407)
Twig\Template->displayWithErrorHandling() (Line: 380)
Twig\Template->display() (Line: 392)
Twig\Template->render() (Line: 65)
twig_render_template() (Line: 384)
Drupal\Core\Theme\ThemeManager->render() (Line: 431)
Drupal\Core\Render\Renderer->doRender() (Line: 444)
Drupal\Core\Render\Renderer->doRender() (Line: 444)
Drupal\Core\Render\Renderer->doRender() (Line: 200)
Drupal\Core\Render\Renderer->render() (Line: 93)
template_preprocess_toolbar() (Line: 287)
Drupal\Core\Theme\ThemeManager->render() (Line: 431)
Drupal\Core\Render\Renderer->doRender() (Line: 444)
Drupal\Core\Render\Renderer->doRender() (Line: 200)
Drupal\Core\Render\Renderer->render() (Line: 450)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 105)
__TwigTemplate_efdfa6415dc85d781edc15c6a94c26201c252dbc98e3688276f19662258a493f->doDisplay() (Line: 407)
Twig\Template->displayWithErrorHandling() (Line: 380)
Twig\Template->display() (Line: 392)
Twig\Template->render() (Line: 65)
twig_render_template() (Line: 384)
Drupal\Core\Theme\ThemeManager->render() (Line: 431)
Drupal\Core\Render\Renderer->doRender() (Line: 200)
Drupal\Core\Render\Renderer->render() (Line: 147)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 573)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 148)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray() (Line: 78)
Symfony\Component\EventDispatcher\LegacyEventDispatcherProxy->dispatch() (Line: 163)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 80)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 57)
Drupal\Core\StackMiddleware\Session->handle() (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 23)
Stack\StackedHttpKernel->handle() (Line: 705)
Drupal\Core\DrupalKernel->handle() (Line: 19)