User error: InvalidArgumentException: Route required

Problem/Motivation

I can verify as mentioned by markdc and SirClickALot in an unrelated issue that Link Trail by Path is causing the following error:

InvalidArgumentException: Route required in Drupal\Core\Url::fromRouteMatch() (line 167 of /home/<...>/public_html/core/lib/Drupal/Core/Url.php)
#0 /home/<...>/public_html/modules/link_trail_by_path/link_trail_by_path.module(51): Drupal\Core\Url::fromRouteMatch(Object(Drupal\Core\Routing\CurrentRouteMatch))
#1 /home/<...>/public_html/core/lib/Drupal/Core/Theme/ThemeManager.php(287): link_trail_by_path_preprocess_links(Array, 'links', Array)
#2 /home/<...>/public_html/core/lib/Drupal/Core/Render/Renderer.php(431): Drupal\Core\Theme\ThemeManager->render('links', Array)
#3 /home/<...>/public_html/core/lib/Drupal/Core/Render/Renderer.php(200): Drupal\Core\Render\Renderer->doRender(Array, true)
#4 /home/<...>/public_html/core/lib/Drupal/Core/Render/Renderer.php(156): Drupal\Core\Render\Renderer->render(Array, true)
#5 /home/<...>/public_html/core/lib/Drupal/Core/Render/Renderer.php(573): Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}()
#6 /home/<...>/public_html/core/lib/Drupal/Core/Render/Renderer.php(157): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure))
#7 /home/<...>/public_html/core/lib/Drupal/Core/Render/Renderer.php(171): Drupal\Core\Render\Renderer->renderPlain(Array)
#8 /home/<...>/public_html/core/modules/big_pipe/src/Render/BigPipe.php(693): Drupal\Core\Render\Renderer->renderPlaceholder('callback=user.t...', Array)
#9 /home/<...>/public_html/core/modules/big_pipe/src/Render/BigPipe.php(547): Drupal\big_pipe\Render\BigPipe->renderPlaceholder('callback=user.t...', Array)
#10 /home/<...>/public_html/core/modules/big_pipe/src/Render/BigPipe.php(305): Drupal\big_pipe\Render\BigPipe->sendPlaceholders(Array, Array, Object(Drupal\Core\Asset\AttachedAssets))
#11 /home/<...>/public_html/core/modules/big_pipe/src/Render/BigPipeResponse.php(112): Drupal\big_pipe\Render\BigPipe->sendContent(Object(Drupal\big_pipe\Render\BigPipeResponse))
#12 /home/<...>/public_html/vendor/symfony/http-foundation/Response.php(374): Drupal\big_pipe\Render\BigPipeResponse->sendContent()
#13 /home/<...>/public_html/index.php(20): Symfony\Component\HttpFoundation\Response->send()
#14 {main}

Steps to reproduce

1. Enable Link Trail by Path and core Database Logging modules.
2. Create node or taxonomy entities using paths existing in a hierarchy, containing links to pages in the path hierarchy a described on the project page.
3. Run cron
4. Visit admin and/or content pages.
5. Check logs and look for PHP error "User error: InvalidArgumentException: Route required".

I'm creating this as a separate issue since #2918474 is focused on Link Trail by Path not working on Views with caching enabled.