Route "entity.alt_text_rule.canonical" does not exist

Problem/Motivation

Drupal 11.3.3
Alt-Text Validation 1.0.1

After a fresh installation of the module, it's not possible to visit the Rules list - admin/config/content/alt-text-validation/rules, it throws the white screen error:

The website encountered an unexpected error. Try again later.

Symfony\Component\Routing\Exception\RouteNotFoundException: Route "entity.alt_text_rule.canonical" does not exist. in Drupal\Core\Routing\RouteProvider->getRouteByName() (line 214 of core/lib/Drupal/Core/Routing/RouteProvider.php).
Drupal\Core\Routing\UrlGenerator->getRoute() (Line: 290)
Drupal\Core\Routing\UrlGenerator->generateFromRoute() (Line: 105)
Drupal\Core\Render\MetadataBubblingUrlGenerator->generateFromRoute() (Line: 773)
Drupal\Core\Url->toString() (Line: 176)
Drupal\Core\Utility\LinkGenerator->generate() (Line: 104)
Drupal\Core\Render\Element\Link::preRenderLink()
call_user_func_array() (Line: 107)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 910)
Drupal\Core\Render\Renderer->doCallback() (Line: 441)
Drupal\Core\Render\Renderer->doRender() (Line: 230)
Drupal\Core\Render\Renderer->render() (Line: 501)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 82)
__TwigTemplate_02324dfcc297b96017c1f1cd0c11f4a9->doDisplay() (Line: 402)
Twig\Template->yield() (Line: 386)
Twig\Template->render() (Line: 51)
Twig\TemplateWrapper->render() (Line: 35)
Drupal\Core\Template\TwigThemeEngine->renderTemplate() (Line: 428)
Drupal\Core\Theme\ThemeManager->render() (Line: 500)
Drupal\Core\Render\Renderer->doRender() (Line: 230)
Drupal\Core\Render\Renderer->render() (Line: 501)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 184)
__TwigTemplate_fa7fa3a9dba9a462e8cb6e46d50a0c9d->doDisplay() (Line: 402)
Twig\Template->yield() (Line: 386)
Twig\Template->render() (Line: 51)
Twig\TemplateWrapper->render() (Line: 35)
Drupal\Core\Template\TwigThemeEngine->renderTemplate() (Line: 428)
Drupal\Core\Theme\ThemeManager->render() (Line: 500)
Drupal\Core\Render\Renderer->doRender() (Line: 513)
Drupal\Core\Render\Renderer->doRender() (Line: 230)
Drupal\Core\Render\Renderer->render() (Line: 242)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 634)
Drupal\Core\Render\Renderer::Drupal\Core\Render\{closure}()
Fiber->resume() (Line: 649)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 235)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 131)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray() (Line: 246)
Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure}() (Line: 206)
Symfony\Component\EventDispatcher\EventDispatcher->callListeners() (Line: 56)
Symfony\Component\EventDispatcher\EventDispatcher->dispatch() (Line: 188)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 60)
Drupal\simple_oauth\HttpMiddleware\BasicAuthSwap->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 53)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 54)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 745)
Drupal\Core\DrupalKernel->handle() (Line: 19)

However, I was able to create a new rule using this URL:/admin/config/content/alt-text-validation/rules/add, and it works when adding a new image. However, the list of rules is still not possible to visit.

Besides this error, the report generation is also broken, it throws another error, probably it should be a seperate issue.
Error: Call to a member function createFileUrl() on null in Drupal\alt_text_validation\Service\ValidationTools->validateImageField() (line 131 of /var/www/html/web/modules/contrib/alt_text_validation/src/Service/ValidationTools.php).

Steps to reproduce

• Install the module
• Go to admin/config/content/alt-text-validation/rules,