Route "entity.backup_migrate_settings.canonical" error

I am getting the following also with 5.0.3 and D10.2.5 and PHP 8.2.17:

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "entity.backup_migrate_settings.canonical" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 206 of core\lib\Drupal\Core\Routing\RouteProvider.php).

I tried to reproduced it with 5.0.3 and D10.2.5 and PHP 8.2, and it is working as expected.

I also searched entity.backup_migrate_settings.canonical in the code base of Backup and Migrate module, but it is not exists in anywhere.

Can you guys please reconfirm your versions?

Thanks
Samit K.

I've upgraded from Drupal 9.5.11 to Drupal 10.2.7 and have just ran into this problem when editing a Settings Profile that I just created and also old ones.

Drupal Version
10.2.7

Web Server
Apache

PHP
Version
8.2.20

Database
Version
MariaDB 10.6.15

The website encountered an unexpected error. Try again later.

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "entity.backup_migrate_settings.canonical" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 206 of core/lib/Drupal/Core/Routing/RouteProvider.php).
Drupal\Core\Routing\UrlGenerator->getRoute('entity.backup_migrate_settings.canonical') (Line: 276)
Drupal\Core\Routing\UrlGenerator->generateFromRoute('entity.backup_migrate_settings.canonical', Array, Array, 1) (Line: 108)
Drupal\Core\Render\MetadataBubblingUrlGenerator->generateFromRoute('entity.backup_migrate_settings.canonical', Array, Array, ) (Line: 765)
Drupal\Core\Url->toString() (Line: 109)
Drupal\responsive_preview\ResponsivePreview->getPreviewUrl() (Line: 327)
Drupal\responsive_preview\ResponsivePreview->previewToolbar() (Line: 33)
responsive_preview_toolbar()
call_user_func_array(Object, Array) (Line: 409)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'responsive_preview') (Line: 388)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('toolbar', Object) (Line: 408)
Drupal\Core\Extension\ModuleHandler->invokeAll('toolbar') (Line: 78)
Drupal\toolbar\Element\Toolbar::preRenderToolbar(Array)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725 → ', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 859)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 421)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 493)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240)
Drupal\Core\Render\Renderer->render(Array) (Line: 475)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 82)
__TwigTemplate_0161ab4a723aa711874be11804be711d->doDisplay(Array, Array) (Line: 394)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 367)
Twig\Template->display(Array) (Line: 379)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 39)
twig_render_template('core/themes/claro/templates/classy/layout/html.html.twig', Array) (Line: 348)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 480)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240)
Drupal\Core\Render\Renderer->render(Array) (Line: 158)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 627)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 153)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 50)
Drupal\ban\BanMiddleware->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 49)
Drupal\remove_http_headers\StackMiddleware\RemoveHttpHeadersMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

should have also mentioned using Version: 5.0.3 of backup_migrate

Added an empty route. This fixed the issue. Changes are in the fork.

I applied the patch in the fork and I’m still getting

The website encountered an unexpected error. Try again later.

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "entity.backup_migrate_settings.canonical" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 208 of core\lib\Drupal\Core\Routing\RouteProvider.php).
Drupal\Core\Routing\UrlGenerator->getRoute('entity.backup_migrate_settings.canonical') (Line: 276)
Drupal\Core\Routing\UrlGenerator->generateFromRoute('entity.backup_migrate_settings.canonical', Array, Array, 1) (Line: 108)
Drupal\Core\Render\MetadataBubblingUrlGenerator->generateFromRoute('entity.backup_migrate_settings.canonical', Array, Array, ) (Line: 765)
Drupal\Core\Url->toString() (Line: 109)
Drupal\responsive_preview\ResponsivePreview->getPreviewUrl() (Line: 327)
Drupal\responsive_preview\ResponsivePreview->previewToolbar() (Line: 33)
responsive_preview_toolbar()
call_user_func_array(Object, Array) (Line: 416)
Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}(Object, 'responsive_preview') (Line: 395)
Drupal\Core\Extension\ModuleHandler->invokeAllWith('toolbar', Object) (Line: 415)
Drupal\Core\Extension\ModuleHandler->invokeAll('toolbar') (Line: 78)
Drupal\toolbar\Element\Toolbar::preRenderToolbar(Array)
call_user_func_array(Array, Array) (Line: 113)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725 → ', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 870)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 432)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 504)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array) (Line: 475)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 83)
__TwigTemplate_66efd5bf41efef913ca5b0215b4df9e2->doDisplay(Array, Array) (Line: 360)
Twig\Template->yield(Array) (Line: 335)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 33)
twig_render_template('themes/contrib/seven/templates/classy/layout/html.html.twig', Array) (Line: 348)
Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 491)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248)
Drupal\Core\Render\Renderer->render(Array) (Line: 158)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 153)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 53)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 741)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

All this with D10.3.1, PHP 8.2.21, MySQL 8.0.36, Backup and Migrate 5.0.3.

I recently ran into this error on my Drupal site after enabling the **Backup and Migrate** module:

Uncaught PHP Exception Symfony\Component\Routing\Exception\RouteNotFoundException: "Route "entity.backup_migrate_settings.canonical" does not exist." 
at /var/www/html/your-site/docroot/core/lib/Drupal/Core/Routing/RouteProvider.php line 208

This happened when I was trying to access some admin configuration pages, and it completely threw me off.

#### Root Cause:
Turns out, the route `entity.backup_migrate_settings.canonical` was missing. This is a critical route for the Backup & Migrate module, and if it’s not properly registered, the module can’t function as expected.

#### How I Fixed It:

Here’s the step-by-step approach I followed to get things working again:

**Add the Missing Route**:
After realizing that the error was caused by a missing route, I opened the `backup_migrate.routing.yml` file (located in `modules/contrib/backup_migrate/backup_migrate.routing.yml`) and added this snippet to define the missing route:

   entity.backup_migrate_settings.canonical:
     path: '/admin/config/development/backup_migrate/settings'
     defaults:
       _entity_form: 'backup_migrate_settings.edit'
       _title: 'Backup and Migrate Settings'
     requirements:
       _permission: 'administer site configuration'
   

3. **Clear the Cache**:
Don’t forget to clear the cache after you make changes to the routing file! Here’s the command to do it:

   drush cr

4. **Rebuild the Routes (if needed)**:
If clearing the cache doesn’t seem to fix things (which didn’t happen for me, but just in case), you can rebuild the routes like this:

   drush router:rebuild

rezarez: Thank you for providing a patch to possibly fix this. Unfortunately your patch file is empty.