Additional uncaught exception thrown while handling exception.

Original

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "<none>" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 201 of /var/www/drupal_86/web/core/lib/Drupal/Core/Routing/RouteProvider.php).

Drupal\Core\Routing\RouteProvider->getRouteByName() (Line: 426)
Drupal\Core\Routing\UrlGenerator->getRoute() (Line: 130)
Drupal\Core\Routing\UrlGenerator->getPathFromRoute() (Line: 68)
Drupal\Core\Render\MetadataBubblingUrlGenerator->getPathFromRoute() (Line: 790)
Drupal\Core\Url->getInternalPath() (Line: 99)
Drupal\Core\Path\PathMatcher->isFrontPage() (Line: 1460)
theme_get_suggestions() (Line: 311)
system_theme_suggestions_html()
call_user_func_array() (Line: 403)
Drupal\Core\Extension\ModuleHandler->invokeAll() (Line: 230)
Drupal\Core\Theme\ThemeManager->render() (Line: 437)
Drupal\Core\Render\Renderer->doRender() (Line: 195)
Drupal\Core\Render\Renderer->render() (Line: 139)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 582)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 140)
Drupal\Core\Render\Renderer->renderRoot() (Line: 66)
Drupal\Core\Render\BareHtmlPageRenderer->renderBarePage() (Line: 76)
Drupal\Core\ProxyClass\Render\BareHtmlPageRenderer->renderBarePage() (Line: 1060)
install_display_output() (Line: 160)
install_drupal() (Line: 44)

Additional

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "<front>" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 201 of /var/www/drupal_86/web/core/lib/Drupal/Core/Routing/RouteProvider.php).

Drupal\Core\Routing\RouteProvider->getRouteByName() (Line: 426)
Drupal\Core\Routing\UrlGenerator->getRoute() (Line: 271)
Drupal\Core\Routing\UrlGenerator->generateFromRoute() (Line: 105)
Drupal\Core\Render\MetadataBubblingUrlGenerator->generateFromRoute() (Line: 753)
Drupal\Core\Url->toString() (Line: 1379)
template_preprocess_page() (Line: 1481)
template_preprocess_maintenance_page() (Line: 1510)
template_preprocess_install_page() (Line: 287)
Drupal\Core\Theme\ThemeManager->render() (Line: 437)
Drupal\Core\Render\Renderer->doRender() (Line: 195)
Drupal\Core\Render\Renderer->render() (Line: 501)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 102)
__TwigTemplate_a8363d0f20b1fc2295a546087d2fed57738f6dc287d19bfa29e4901aa5b28836->doDisplay() (Line: 443)
Twig\Template->displayWithErrorHandling() (Line: 414)
Twig\Template->display() (Line: 422)
Twig\Template->render() (Line: 64)
twig_render_template() (Line: 384)
Drupal\Core\Theme\ThemeManager->render() (Line: 437)
Drupal\Core\Render\Renderer->doRender() (Line: 195)
Drupal\Core\Render\Renderer->render() (Line: 139)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 582)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 140)
Drupal\Core\Render\Renderer->renderRoot() (Line: 66)
Drupal\Core\Render\BareHtmlPageRenderer->renderBarePage() (Line: 76)
Drupal\Core\ProxyClass\Render\BareHtmlPageRenderer->renderBarePage() (Line: 1060)
install_display_output() (Line: 260)
_drupal_log_error() (Line: 605)
_drupal_exception_handler()