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Error: Call to undefined function file_create_url() in visually_impaired_theme_library_info_alter() (line 64 of themes/visually_impaired_theme/visually_impaired_theme.theme).
Drupal\Core\Theme\ThemeManager->alterForTheme() (Line: 467)
Drupal\Core\Theme\ThemeManager->alter() (Line: 379)
Drupal\Core\Asset\LibraryDiscoveryParser->parseLibraryInfo() (Line: 130)
Drupal\Core\Asset\LibraryDiscoveryParser->buildByExtension() (Line: 87)
Drupal\Core\Asset\LibraryDiscoveryCollector->getLibraryDefinitions() (Line: 66)
Drupal\Core\Asset\LibraryDiscoveryCollector->resolveCacheMiss() (Line: 149)
Drupal\Core\Cache\CacheCollector->get() (Line: 44)
Drupal\Core\Asset\LibraryDiscovery->getLibrariesByExtension() (Line: 58)
Drupal\Core\Asset\LibraryDiscovery->getLibraryByName() (Line: 68)
Drupal\Core\Asset\LibraryDependencyResolver->doGetDependencies() (Line: 41)
Drupal\Core\Asset\LibraryDependencyResolver->getLibrariesWithDependencies() (Line: 87)
Drupal\Core\Asset\LibraryDependencyResolver->getMinimalRepresentativeSubset() (Line: 113)
Drupal\Core\Asset\AssetResolver->getLibrariesToLoad() (Line: 131)
Drupal\Core\Asset\AssetResolver->getCssAssets() (Line: 321)
Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAssetLibraries() (Line: 165)
Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments() (Line: 97)
Drupal\big_pipe\Render\BigPipeResponseAttachmentsProcessor->processAttachments() (Line: 45)
Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond()
call_user_func() (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 214)
Symfony\Component\HttpKernel\HttpKernel->filterResponse() (Line: 202)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 166)
Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber->makeSubrequest() (Line: 122)
Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber->on404() (Line: 109)
Drupal\Core\EventSubscriber\HttpExceptionSubscriberBase->onException()
call_user_func() (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 239)
Symfony\Component\HttpKernel\HttpKernel->handleThrowable() (Line: 91)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 704)
Drupal\Core\DrupalKernel->handle() (Line: 19)