white page for subtheme: error message: bootstrap.inc(347): _drupal_error_handler_real()

Problem/Motivation

Hi everyone,

My problem: White page after rebuild cache (not the administration theme).

Perhaps after this command (not shure) :

php /usr/local/bin/composer update "drupal/*" --with-all-dependencies

Only white page for subtheme (but it was ok a week ago). I don't understand what is broken. Can you help me ?

Error message :

Warning : Invalid argument supplied for foreach() dans Drupal\Core\Asset\LibraryDiscoveryParser->buildByExtension() (/var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php ligne 186)
#0 /var/www/drupal/web/core/includes/bootstrap.inc(347): _drupal_error_handler_real()
#1 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryParser.php(186): _drupal_error_handler()
#2 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php(87): Drupal\Core\Asset\LibraryDiscoveryParser->buildByExtension()
#3 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php(66): Drupal\Core\Asset\LibraryDiscoveryCollector->getLibraryDefinitions()
#4 /var/www/drupal/web/core/lib/Drupal/Core/Cache/CacheCollector.php(149): Drupal\Core\Asset\LibraryDiscoveryCollector->resolveCacheMiss()
#5 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php(149): Drupal\Core\Cache\CacheCollector->get()
#6 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php(111): Drupal\Core\Asset\LibraryDiscoveryCollector->applyLibrariesExtend()
#7 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php(66): Drupal\Core\Asset\LibraryDiscoveryCollector->getLibraryDefinitions()
#8 /var/www/drupal/web/core/lib/Drupal/Core/Cache/CacheCollector.php(149): Drupal\Core\Asset\LibraryDiscoveryCollector->resolveCacheMiss()
#9 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php(149): Drupal\Core\Cache\CacheCollector->get()
#10 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php(111): Drupal\Core\Asset\LibraryDiscoveryCollector->applyLibrariesExtend()
#11 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscoveryCollector.php(66): Drupal\Core\Asset\LibraryDiscoveryCollector->getLibraryDefinitions()
#12 /var/www/drupal/web/core/lib/Drupal/Core/Cache/CacheCollector.php(149): Drupal\Core\Asset\LibraryDiscoveryCollector->resolveCacheMiss()
#13 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscovery.php(44): Drupal\Core\Cache\CacheCollector->get()
#14 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDiscovery.php(58): Drupal\Core\Asset\LibraryDiscovery->getLibrariesByExtension()
#15 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDependencyResolver.php(68): Drupal\Core\Asset\LibraryDiscovery->getLibraryByName()
#16 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDependencyResolver.php(70): Drupal\Core\Asset\LibraryDependencyResolver->doGetDependencies()
#17 /var/www/drupal/web/core/lib/Drupal/Core/Asset/LibraryDependencyResolver.php(41): Drupal\Core\Asset\LibraryDependencyResolver->doGetDependencies()
#18 /var/www/drupal/web/core/lib/Drupal/Core/Asset/AssetResolver.php(104): Drupal\Core\Asset\LibraryDependencyResolver->getLibrariesWithDependencies()
#19 /var/www/drupal/web/core/lib/Drupal/Core/Asset/AssetResolver.php(116): Drupal\Core\Asset\AssetResolver->getLibrariesToLoad()
#20 /var/www/drupal/web/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(312): Drupal\Core\Asset\AssetResolver->getCssAssets()
#21 /var/www/drupal/web/core/lib/Drupal/Core/Render/HtmlResponseAttachmentsProcessor.php(158): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAssetLibraries()
#22 /var/www/drupal/web/core/modules/big_pipe/src/Render/BigPipeResponseAttachmentsProcessor.php(94): Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments()
#23 /var/www/drupal/web/core/lib/Drupal/Core/EventSubscriber/HtmlResponseSubscriber.php(45): Drupal\big_pipe\Render\BigPipeResponseAttachmentsProcessor->processAttachments()
#24 [internal function]: Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond()
#25 /var/www/drupal/web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(142): call_user_func()
#26 /var/www/drupal/vendor/symfony/http-kernel/HttpKernel.php(192): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch()
#27 /var/www/drupal/vendor/symfony/http-kernel/HttpKernel.php(180): Symfony\Component\HttpKernel\HttpKernel->filterResponse()
#28 /var/www/drupal/vendor/symfony/http-kernel/HttpKernel.php(81): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#29 /var/www/drupal/web/core/lib/Drupal/Core/StackMiddleware/Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle()
#30 /var/www/drupal/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle()
#31 /var/www/drupal/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(106): Drupal\Core\StackMiddleware\KernelPreHandle->handle()
#32 /var/www/drupal/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass()
#33 /var/www/drupal/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle()
#34 /var/www/drupal/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle()
#35 /var/www/drupal/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle()
#36 /var/www/drupal/web/core/lib/Drupal/Core/DrupalKernel.php(709): Stack\StackedHttpKernel->handle()
#37 /var/www/drupal/web/index.php(19): Drupal\Core\DrupalKernel->handle()
#38 {main}