Error 500 with login BE after conversion 4.8 to dev-master

[zonky2]

Error 500 with login BE after conversion 4.8 to dev-master

TypeError:
Argument 1 passed to Contao\CoreBundle\EventListener\ExceptionConverterListener::getTargetClass() must be an instance of Exception, instance of TypeError given, called in /html/mm220/vendor/contao/core-bundle/src/EventListener/ExceptionConverterListener.php on line 59

  at /html/mm220/vendor/contao/core-bundle/src/EventListener/ExceptionConverterListener.php:70
  at Contao\CoreBundle\EventListener\ExceptionConverterListener->getTargetClass(object(TypeError))
     (/html/mm220/vendor/contao/core-bundle/src/EventListener/ExceptionConverterListener.php:59)
  at Contao\CoreBundle\EventListener\ExceptionConverterListener->onKernelException(object(ExceptionEvent), 'kernel.exception', object(EventDispatcher))
     (/html/mm220/vendor/symfony/event-dispatcher/EventDispatcher.php:304)
  at Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure}(object(ExceptionEvent), 'kernel.exception', object(EventDispatcher))
     (/html/mm220/vendor/symfony/event-dispatcher/EventDispatcher.php:264)
  at Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(array(object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure)), 'kernel.exception', object(ExceptionEvent))
     (/html/mm220/vendor/symfony/event-dispatcher/EventDispatcher.php:239)
  at Symfony\Component\EventDispatcher\EventDispatcher->callListeners(array(object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure), object(Closure)), 'kernel.exception', object(ExceptionEvent))
     (/html/mm220/vendor/symfony/event-dispatcher/EventDispatcher.php:73)
  at Symfony\Component\EventDispatcher\EventDispatcher->dispatch(object(ExceptionEvent), 'kernel.exception')
     (/html/mm220/vendor/symfony/http-kernel/HttpKernel.php:207)
  at Symfony\Component\HttpKernel\HttpKernel->handleThrowable(object(TypeError), object(Request), 1)
     (/html/mm220/vendor/symfony/http-kernel/HttpKernel.php:100)
  at Symfony\Component\HttpKernel\HttpKernel->terminateWithException(object(TypeError), object(Request))
     (/html/mm220/vendor/symfony/http-kernel/EventListener/DebugHandlersListener.php:116)
  at Symfony\Component\HttpKernel\EventListener\DebugHandlersListener::Symfony\Component\HttpKernel\EventListener\{closure}(object(TypeError))
     (/html/mm220/vendor/symfony/error-handler/ErrorHandler.php:592)
  at Symfony\Component\ErrorHandler\ErrorHandler->handleException(object(TypeError))

[leofeyer]

Should be fixed in #1050.