Code:
TypeError:
Return value of Contao\CoreBundle\Util\LocaleUtil::formatAsLocale() must be of the type string, null returned
at vendor/contao/core-bundle/src/Util/LocaleUtil.php:112
at Contao\CoreBundle\Util\LocaleUtil::formatAsLocale('')
(vendor/contao/core-bundle/src/Routing/Page/PageRoute.php:55)
at Contao\CoreBundle\Routing\Page\PageRoute->__construct(object(PageModel), '/22{!parameters}', array('_controller' => 'Contao\\CoreBundle\\Controller\\Page\\RootPageController', 'parameters' => ''), array('parameters' => '(/.+?)?'), array(), array())
(vendor/contao/core-bundle/src/Routing/Page/PageRegistry.php:79)
at Contao\CoreBundle\Routing\Page\PageRegistry->getRoute(object(PageModel))
(vendor/contao/core-bundle/src/Routing/RouteProvider.php:196)
at Contao\CoreBundle\Routing\RouteProvider->addRoutesForRootPage(object(PageModel), array('tl_page.1.root' => object(Route)))
(vendor/contao/core-bundle/src/Routing/RouteProvider.php:162)
at Contao\CoreBundle\Routing\RouteProvider->addRoutesForRootPages(array(object(PageModel), object(PageModel), object(PageModel)), array('tl_page.1.root' => object(Route)))
(vendor/contao/core-bundle/src/Routing/RouteProvider.php:70)
at Contao\CoreBundle\Routing\RouteProvider->getRouteCollectionForRequest(object(Request))
(vendor/symfony-cmf/routing/src/NestedMatcher/NestedMatcher.php:140)
at Symfony\Cmf\Component\Routing\NestedMatcher\NestedMatcher->matchRequest(object(Request))
(vendor/contao/core-bundle/src/Routing/Matcher/LegacyMatcher.php:70)
at Contao\CoreBundle\Routing\Matcher\LegacyMatcher->matchRequest(object(Request))
(vendor/symfony-cmf/routing/src/DynamicRouter.php:272)
at Symfony\Cmf\Component\Routing\DynamicRouter->matchRequest(object(Request))
(vendor/symfony-cmf/routing/src/ChainRouter.php:188)
at Symfony\Cmf\Component\Routing\ChainRouter->doMatch('/', object(Request))
(vendor/symfony-cmf/routing/src/ChainRouter.php:158)
at Symfony\Cmf\Component\Routing\ChainRouter->matchRequest(object(Request))
(vendor/symfony/http-kernel/EventListener/RouterListener.php:112)
at Symfony\Component\HttpKernel\EventListener\RouterListener->onKernelRequest(object(RequestEvent), 'kernel.request', object(TraceableEventDispatcher))
(vendor/symfony/event-dispatcher/Debug/WrappedListener.php:126)
at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke(object(RequestEvent), 'kernel.request', object(TraceableEventDispatcher))
(vendor/symfony/event-dispatcher/EventDispatcher.php:264)
at Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.request', object(RequestEvent))
(vendor/symfony/event-dispatcher/EventDispatcher.php:239)
at Symfony\Component\EventDispatcher\EventDispatcher->callListeners(array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.request', object(RequestEvent))
(vendor/symfony/event-dispatcher/EventDispatcher.php:73)
at Symfony\Component\EventDispatcher\EventDispatcher->dispatch(object(RequestEvent), 'kernel.request')
(vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:168)
at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch(object(RequestEvent), 'kernel.request')
(vendor/symfony/http-kernel/HttpKernel.php:134)
at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
(vendor/symfony/http-kernel/HttpKernel.php:80)
at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
(vendor/symfony/http-kernel/Kernel.php:201)
at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
(web/index.php:31)
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