Symfony\Component\Routing\Exception\RouteNotFoundException: Route "entity.taxonomy_menu.edit_form" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 193 of /core/lib/Drupal/Core/Routing/Route

search file taxonomy_menu.routing.yml
and change line 18

before

/entity.taxonomy_menu.edit_form:

after

entity.taxonomy_menu.edit_form:

I am not able to reproduce this on RC4.

Can you please re-test and let me know if this issue still exists?

I notice this problem occurs with different modules using Drupal 8.0
Route "captcha_settings" does not exist
Route "google_analytics.admin_settings_form" does not exist
Route "forum.overview" does not exist.

Wanted to give feedback ...

#3 worked for me.
This error, occurred just after I tried to create the first taxonomy menu. the menu was created successfully, but when I go to the menu //structure//taxonomy menu// the error show up.
anyway it was just a "/" on file taxonomy_menu.routing.yml at line 16, as #3 wrote..

ooops after flushing cache a HUGE error shows up. like #8. I remove the module, and stills the error shows up...

Just got this message on a D 8.0.0 installation too:

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "entity.taxonomy_menu.edit_form" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 191 of core/lib/Drupal/Core/Routing/RouteProvider.php).

Drupal\Core\Routing\UrlGenerator->getRoute('entity.taxonomy_menu.edit_form')
Drupal\Core\Routing\UrlGenerator->generateFromRoute('entity.taxonomy_menu.edit_form', Array, Array, 1)
Drupal\Core\Render\MetadataBubblingUrlGenerator->generateFromRoute('entity.taxonomy_menu.edit_form', Array, Array, 1)
Drupal\Core\Url->toString(1)
Drupal\Core\Utility\LinkGenerator->generate(Object, 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\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1)
__TwigTemplate_274fa538b9e9b38862d70154a72f2e7561f261e17bebf268f9fe6142ca6b00df->doDisplay(Array, Array)
Twig_Template->displayWithErrorHandling(Array, Array)
Twig_Template->display(Array)
Twig_Template->render(Array)
twig_render_template('core/themes/classy/templates/navigation/links.html.twig', Array)
Drupal\Core\Theme\ThemeManager->render('links__dropbutton__operations', Array)
Drupal\Core\Render\Renderer->doRender(Array, )
Drupal\Core\Render\Renderer->render(Array)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1)
__TwigTemplate_a32454059273c52fefadf1027c4ddecaf3c46d340629f29223dc209fad082165->doDisplay(Array, Array)
Twig_Template->displayWithErrorHandling(Array, Array)
Twig_Template->display(Array)
Twig_Template->render(Array)
twig_render_template('core/themes/classy/templates/dataset/table.html.twig', Array)
Drupal\Core\Theme\ThemeManager->render('table', Array)
Drupal\Core\Render\Renderer->doRender(Array)
Drupal\Core\Render\Renderer->doRender(Array, )
Drupal\Core\Render\Renderer->render(Array, )
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}()
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object)
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\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1)
Drupal\page_cache\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)

Very strange, but with this installation just had similar error messages ...

On another installation (which aim is to test new modules) and with former release candidates the module worked only for building one taxonomy menu: after installing a menu i got the unspecic error message: "Auf der Website ist ein unvorhergesehener Fehler aufgetreten. Bitte versuchen Sie es später nochmal."

If it recall the taxonomy menu to install another menu (/admin/config/system/taxonomy_menu) i get this error message too ...

Very strange.

Same error as #8 shows up in my test D 8.0.0 installation..
I see still the error after remove the module, and flushing caches...
any ideas?

I made the fix #3 too. It seemed to work but unfortunately not really propper.

If I install configuration translation the modul doesnt work too (i had the problem just before).

I put 3 taxonomy menues into the main navigation. First it worked, but only till i created an article for the menu. the website design broke. i tried another layout (mayo), it didnt work too ...

i removed the main menu block from the page, the website (bartik) was ok, but i couldnt add new links to the main menu and to other menus - which dont include ta taxonomy menu - too (just get only a blank page)

very strange ...

After removing the menu with a taxonomy menue and removing the taxonomy module menu now i get an error message when i try to add a link to another menu:

Auf der Website ist ein unvorhergesehener Fehler aufgetreten. Bitte versuchen Sie es später nochmal.

Drupal\Component\Plugin\Exception\PluginException: Plugin (taxonomy_menu.menu_link:taxonomy_menu.menu_link.hauptnavigation_themen.378) instance class "Drupal\taxonomy_menu\Plugin\Menu\TaxonomyMenuMenuLink" does not exist. in Drupal\Component\Plugin\Factory\DefaultFactory::getPluginClass() (line 102 of core/lib/Drupal/Component/Plugin/Factory/DefaultFactory.php).

Drupal\Core\Plugin\Factory\ContainerFactory->createInstance('taxonomy_menu.menu_link:taxonomy_menu.menu_link.hauptnavigation_themen.378', Array)
Drupal\Core\Menu\MenuLinkManager->createInstance('taxonomy_menu.menu_link:taxonomy_menu.menu_link.hauptnavigation_themen.378')
Drupal\Core\Menu\MenuLinkTree->createInstances(Array)
Drupal\Core\Menu\MenuLinkTree->load('main', Object)
Drupal\Core\Menu\MenuParentFormSelector->getParentSelectOptions('', NULL, Object)
Drupal\Core\Menu\MenuParentFormSelector->parentSelectElement('hauptnavigation:', '')
Drupal\menu_link_content\Form\MenuLinkContentForm->form(Array, Object)
Drupal\Core\Entity\EntityForm->buildForm(Array, Object)
call_user_func_array(Array, Array)
Drupal\Core\Form\FormBuilder->retrieveForm('menu_link_content_menu_link_content_form', Object)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object)
Drupal\Core\Entity\EntityFormBuilder->getForm(Object)
Drupal\menu_link_content\Controller\MenuController->addLink(Object)
call_user_func_array(Array, Array)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}()
call_user_func_array(Object, Array)
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\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1)
Drupal\ban\BanMiddleware->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)

I am running the latest version of Drupal 8 (RC1), and after I installed taxonomy menu and tried adding a menu I go the following error:

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "entity.taxonomy_menu.edit_form" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 193 of /core/lib/Drupal/Core/Routing/Route

Any ideas how to fix this?

This appears to be fixed now that Drupal 8 has been released (specifically 8.0.2). I enabled Taxonomy Menu (using the most recent code in the 8.x-3.x branch), created a new menu, the error was not thrown.

After removing the menu with a taxonomy menue and removing the taxonomy module menu now i get an error message when i try to add a link to another menu:

I am not able to reproduce any issues on Drupal 8.0.2 with the current 8.x-3.x code.

Steps I followed:
1. Create a taxonomy menu, assign "test menu" menu
2. Delete "test menu" menu (no error)
3. Added a link to another arbitrary menu (no error)

Am I missing something?

Closing this issue as "cannot reproduce", but willing to retest given more specifics.

Additional uncaught exception thrown while handling exception.

Original

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 187 of C:\xampp\htdocs\drupal\core\lib\Drupal\Core\Routing\RouteProvider.php).

Drupal\Core\Routing\RouteProvider->getRouteByName('') (Line: 425)
Drupal\Core\Routing\UrlGenerator->getRoute('') (Line: 121)
Drupal\Core\Routing\UrlGenerator->getPathFromRoute('', Array) (Line: 68)
Drupal\Core\Render\MetadataBubblingUrlGenerator->getPathFromRoute('', Array) (Line: 772)
Drupal\Core\Url->getInternalPath() (Line: 99)
Drupal\Core\Path\PathMatcher->isFrontPage() (Line: 254)
system_theme_suggestions_html(Array)
call_user_func_array('system_theme_suggestions_html', Array) (Line: 402)
Drupal\Core\Extension\ModuleHandler->invokeAll('theme_suggestions_html', Array) (Line: 230)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 435)
Drupal\Core\Render\Renderer->doRender(Array, 1) (Line: 195)
Drupal\Core\Render\Renderer->render(Array, 1) (Line: 139)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 140)
Drupal\Core\Render\Renderer->renderRoot(Array) (Line: 66)
Drupal\Core\Render\BareHtmlPageRenderer->renderBarePage(Array, Object, 'install_page', Array) (Line: 76)
Drupal\Core\ProxyClass\Render\BareHtmlPageRenderer->renderBarePage(Array, Object, 'install_page', Array) (Line: 998)
install_display_output(Array, Array) (Line: 154)
install_drupal(Object) (Line: 44)
Additional

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 187 of C:\xampp\htdocs\drupal\core\lib\Drupal\Core\Routing\RouteProvider.php).

Drupal\Core\Routing\RouteProvider->getRouteByName('') (Line: 425)
Drupal\Core\Routing\UrlGenerator->getRoute('') (Line: 277)
Drupal\Core\Routing\UrlGenerator->generateFromRoute('', Array, Array, 1) (Line: 105)
Drupal\Core\Render\MetadataBubblingUrlGenerator->generateFromRoute('', Array, Array, ) (Line: 543)
Drupal::url('') (Line: 1356)
template_preprocess_page(Array) (Line: 1458)
template_preprocess_maintenance_page(Array) (Line: 1487)
template_preprocess_install_page(Array, 'install_page', Array) (Line: 287)
Drupal\Core\Theme\ThemeManager->render('install_page', Array) (Line: 435)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer->render(Array) (Line: 468)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 90)
__TwigTemplate_3ca16517bf3776375e3e02ac162becccac1bbe4172908107101d5ed2dce97277->doDisplay(Array, Array) (Line: 381)
Twig_Template->displayWithErrorHandling(Array, Array) (Line: 355)
Twig_Template->display(Array) (Line: 366)
Twig_Template->render(Array) (Line: 64)
twig_render_template('core/themes/classy/templates/layout/html.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 435)
Drupal\Core\Render\Renderer->doRender(Array, 1) (Line: 195)
Drupal\Core\Render\Renderer->render(Array, 1) (Line: 139)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 140)
Drupal\Core\Render\Renderer->renderRoot(Array) (Line: 66)
Drupal\Core\Render\BareHtmlPageRenderer->renderBarePage(Array, 'Error', 'install_page', Array) (Line: 76)
Drupal\Core\ProxyClass\Render\BareHtmlPageRenderer->renderBarePage(Array, 'Error', 'install_page', Array) (Line: 998)
install_display_output(Array, Array, Array) (Line: 264)
_drupal_log_error(Array, 1) (Line: 566)
_drupal_exception_handler(Object)

I've got the same fatal error when I try to manage my queue :

Symfony\Component\Routing\Exception\RouteNotFoundException : Route "view.advancedqueue_jobs.page_1" does not exist. dans Drupal\Core\Routing\RouteProvider->getRouteByName() (ligne 202 de /home/xx/xx/core/lib/Drupal/Core/Routing/RouteProvider.php).

Any idea ?

jBernard,

I found your comment while trying to find a solution to this issue myself. I was able to solve my issue thanks to this thread:

https://www.drupal.org/project/drupal/issues/2830774

Basically, if you get drush working on your installation (http://docs.drush.org/en/master/install/) , you can run drush cr. Thats it. This clears caches and "rebuilds" the site hopefully clearing what is causing that issue. This worked for me and a few other people.

#6 please how did you resolve the error for "google_analytics.admin_settings_form" does not exist??