Drupal 8.8.8 - Drupal\Core\Asset\Exception\InvalidLibrariesOverrideSpecificationException: The specified library claro/classy.book-navigation does not exist.
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #3165241. -->
Reported by: [martijn de wit](https://www.drupal.org/user/83953)
>>>
<h3 id="summary-problem-motivation">Problem/Motivation</h3>
<p>Error after enabling Gin as Admin theme.</p>
<pre>The website encountered an unexpected error. Please try again later.<br><br>Drupal\Core\Asset\Exception\InvalidLibrariesOverrideSpecificationException: The specified library claro/classy.book-navigation does not exist. in Drupal\Core\Asset\LibraryDiscoveryCollector->getLibraryDefinitions() (line 105 of core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php).<br>Drupal\Core\Asset\LibraryDiscoveryCollector->resolveCacheMiss('classy') (Line: 149)<br>Drupal\Core\Cache\CacheCollector->get('classy') (Line: 144)<br>Drupal\Core\Asset\LibraryDiscoveryCollector->applyLibrariesExtend('core', 'drupal.dialog', Array) (Line: 111)<br>Drupal\Core\Asset\LibraryDiscoveryCollector->getLibraryDefinitions('core') (Line: 66)<br>Drupal\Core\Asset\LibraryDiscoveryCollector->resolveCacheMiss('core') (Line: 149)<br>Drupal\Core\Cache\CacheCollector->get('core') (Line: 44)<br>Drupal\Core\Asset\LibraryDiscovery->getLibrariesByExtension('core') (Line: 58)<br>Drupal\Core\Asset\LibraryDiscovery->getLibraryByName('core', 'html5shiv') (Line: 54)<br>Drupal\Core\Asset\LibraryDependencyResolver->doGetDependencies(Array) (Line: 31)<br>Drupal\Core\Asset\LibraryDependencyResolver->getLibrariesWithDependencies(Array) (Line: 104)<br>Drupal\Core\Asset\AssetResolver->getLibrariesToLoad(Object) (Line: 116)<br>Drupal\Core\Asset\AssetResolver->getCssAssets(Object, ) (Line: 315)<br>Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAssetLibraries(Object, Array) (Line: 161)<br>Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments(Object) (Line: 45)<br>Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond(Object, 'kernel.response', Object)<br>call_user_func(Array, Object, 'kernel.response', Object) (Line: 111)<br>Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.response', Object) (Line: 191)<br>Symfony\Component\HttpKernel\HttpKernel->filterResponse(Object, Object, 1) (Line: 173)<br>Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)<br>Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)<br>Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)<br>Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)<br>Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)<br>Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 49)<br>Asm89\Stack\Cors->handle(Object, 1, 1) (Line: 47)<br>Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)<br>Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)<br>Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)<br>Drupal\Core\DrupalKernel->handle(Object) (Line: 19)</pre><h4 id="summary-steps-reproduce">Steps to reproduce</h4>
<p>Install latest Gin theme in combination with Drupal 8.8.8</p>
<h3 id="summary-proposed-resolution">Proposed resolution</h3>
<h3 id="summary-remaining-tasks">Remaining tasks</h3>
<h3 id="summary-ui-changes">User interface changes</h3>
<h3 id="summary-api-changes">API changes</h3>
<h3 id="summary-data-model-changes">Data model changes</h3>
issue