Error when logging in to demo site

[hcpss-banderson]

With username admin and password kitton, I get this error:

Symfony\Component\Security\Core\Exception\BadCredentialsException: Bad credentials. in /srv/dime-timetracker.de/htdocs/demo/vendor/symfony/symfony/src/Symfony/Component/Security/Core/Authentication/Provider/UserAuthenticationProvider.php:73 Stack trace: #0 /srv/dime-timetracker.de/htdocs/demo/app/cache/prod/classes.php(120): session_start() #1 /srv/dime-timetracker.de/htdocs/demo/app/cache/prod/classes.php(192): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start() #2 /srv/dime-timetracker.de/htdocs/demo/app/cache/prod/classes.php(492): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->getBag('attributes') #3 /srv/dime-timetracker.de/htdocs/demo/vendor/symfony/symfony/src/Symfony/Component/Security/Http/Firewall/ContextListener.php(78): Symfony\Component\HttpFoundation\Session\Session->get('_security_main') #4 /srv/dime-timetracker.de/htdocs/demo/app/cache/prod/classes.php(3012): Symfony\Component\Security\Http\Firewall\ContextListener->handle(Object(Symfony\Component\HttpKernel\Event\GetResponseEvent)) #5 [internal function]: Symfony\Component\Security\Http\Firewall->onKernelRequest(Object(Symfony\Component\HttpKernel\Event\GetResponseEvent), 'kernel.request', Object(Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher)) #6 /srv/dime-timetracker.de/htdocs/demo/app/cache/prod/classes.php(2272): call_user_func(Array, Object(Symfony\Component\HttpKernel\Event\GetResponseEvent), 'kernel.request', Object(Symfony\Component\EventDispatcher\ContainerAwareEventDispatcher)) #7 /srv/dime-timetracker.de/htdocs/demo/app/cache/prod/classes.php(2201): Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(Array, 'kernel.request', Object(Symfony\Component\HttpKernel\Event\GetResponseEvent)) #8 /srv/dime-timetracker.de/htdocs/demo/app/bootstrap.php.cache(3098): Symfony\Component\EventDispatcher\EventDispatcher->dispatch('kernel.request', Object(Symfony\Component\HttpKernel\Event\GetResponseEvent)) #9 /srv/dime-timetracker.de/htdocs/demo/app/bootstrap.php.cache(3071): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #10 /srv/dime-timetracker.de/htdocs/demo/app/bootstrap.php.cache(3222): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #11 /srv/dime-timetracker.de/htdocs/demo/app/bootstrap.php.cache(2444): Symfony\Component\HttpKernel\DependencyInjection\ContainerAwareHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #12 /srv/dime-timetracker.de/htdocs/demo/web/app.php(28): Symfony\Component\HttpKernel\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #13 {main}