Code:
ErrorException:
Warning: Undefined array key "current"
at vendor/contao/core-bundle/src/EventListener/StoreRefererListener.php:81
at Contao\CoreBundle\EventListener\StoreRefererListener->__invoke(object(ResponseEvent), 'kernel.response', object(TraceableEventDispatcher))
(vendor/symfony/event-dispatcher/Debug/WrappedListener.php:115)
at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke(object(ResponseEvent), 'kernel.response', object(TraceableEventDispatcher))
(vendor/symfony/event-dispatcher/EventDispatcher.php:206)
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), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.response', object(ResponseEvent))
(vendor/symfony/event-dispatcher/EventDispatcher.php:56)
at Symfony\Component\EventDispatcher\EventDispatcher->dispatch(object(ResponseEvent), 'kernel.response')
(vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:127)
at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch(object(ResponseEvent), 'kernel.response')
(vendor/symfony/http-kernel/HttpKernel.php:196)
at Symfony\Component\HttpKernel\HttpKernel->filterResponse(object(Response), object(Request), 1)
(vendor/symfony/http-kernel/HttpKernel.php:184)
at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
(vendor/symfony/http-kernel/HttpKernel.php:75)
at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
(vendor/symfony/http-kernel/Kernel.php:202)
at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
(public/index.php:44)
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