Twig_Error_Runtime: Key "termsOfUse" does not exist as the array is empty

[rallek]

creating a new user is showing this issue:
see also zikula/core#3253

[1] Twig_Error_Runtime: Key "termsOfUse" does not exist as the array is empty in "@ZikulaLegalModule/Include/acceptPolicies.html.twig" at line 13.
    at n/a
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 552

    at Twig_Template->getAttribute(array(), 'termsOfUse', array())
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/app/cache/prod/twig/6f/6f1d018c2f2ac52cd8b7516c9af6871f233936feb7a871b59ad35997681248ef.php line 55

    at __TwigTemplate_d1925e03647dc05dfd520deef71209d3030f2f0fe5c98ebe1f140766418a79de->doDisplay(array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA==', 'app' => object(AppVariable), 'pagevars' => object(ParameterBag), 'themevars' => object(ParameterBag), 'currentUser' => object(CurrentUserApi), 'localeApi' => object(LocaleApi)), array())
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 428

    at Twig_Template->displayWithErrorHandling(array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA==', 'app' => object(AppVariable), 'pagevars' => object(ParameterBag), 'themevars' => object(ParameterBag), 'currentUser' => object(CurrentUserApi), 'localeApi' => object(LocaleApi)), array())
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 396

    at Twig_Template->display(array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA==', 'app' => object(AppVariable), 'pagevars' => object(ParameterBag), 'themevars' => object(ParameterBag), 'currentUser' => object(CurrentUserApi), 'localeApi' => object(LocaleApi)))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 407

    at Twig_Template->render(array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA==', 'app' => object(AppVariable), 'pagevars' => object(ParameterBag), 'themevars' => object(ParameterBag), 'currentUser' => object(CurrentUserApi), 'localeApi' => object(LocaleApi)))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Extension/Core.php line 1396

    at twig_include(object(Twig_Environment), array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA==', 'app' => object(AppVariable), 'pagevars' => object(ParameterBag), 'themevars' => object(ParameterBag), 'currentUser' => object(CurrentUserApi), 'localeApi' => object(LocaleApi)), '@ZikulaLegalModule/Include/acceptPolicies.html.twig')
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/app/cache/prod/twig/47/47fcc8ba9ae8db006b51087c74c3fba3d4eb7c0937a1a6317b4eb6758c8353cf.php line 34

    at __TwigTemplate_1404b4d5f1e99317ed5b300bd8b3f06fddf0e21f10a1271a0c5adfcbaee934c3->doDisplay(array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA==', 'app' => object(AppVariable), 'pagevars' => object(ParameterBag), 'themevars' => object(ParameterBag), 'currentUser' => object(CurrentUserApi), 'localeApi' => object(LocaleApi)), array())
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 428

    at Twig_Template->displayWithErrorHandling(array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA==', 'app' => object(AppVariable), 'pagevars' => object(ParameterBag), 'themevars' => object(ParameterBag), 'currentUser' => object(CurrentUserApi), 'localeApi' => object(LocaleApi)), array())
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 396

    at Twig_Template->display(array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA=='))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 407

    at Twig_Template->render(array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA=='))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Environment.php line 362

    at Twig_Environment->render('@ZikulaLegalModule/UsersUI/editRegistration.html.twig', array('activePolicies' => array('termsOfUse' => '1', 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'originalAcceptedPolicies' => array(), 'acceptedPolicies' => array('termsOfUse' => false, 'privacyPolicy' => false, 'agePolicy' => false, 'cancellationRightPolicy' => false, 'tradeConditions' => false), 'fieldErrors' => array(), 'csrfToken' => 'NTg0MzAwMGFkMWU1NTguNTUyOTUzNTE6MzQ3ZjkzNWY1NGY3YjQ4OGMyOGNlN2YwNzE1YmMzODI6MTQ4MDc4NTkzMA=='))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/modules/zikula/legal-module/Listener/UsersUiListener.php line 274

    at Zikula\LegalModule\Listener\UsersUiListener->uiEdit(object(GenericEvent), 'module.users.ui.form_edit.new_registration', object(TraceableEventDispatcher))
        in  line 

    at call_user_func(array(object(UsersUiListener), 'uiEdit'), object(GenericEvent), 'module.users.ui.form_edit.new_registration', object(TraceableEventDispatcher))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/Debug/WrappedListener.php line 61

    at Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke(object(GenericEvent), 'module.users.ui.form_edit.new_registration', object(Zikula_EventManager))
        in  line 

    at call_user_func(object(WrappedListener), object(GenericEvent), 'module.users.ui.form_edit.new_registration', object(Zikula_EventManager))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/EventDispatcher.php line 184

    at Symfony\Component\EventDispatcher\EventDispatcher->doDispatch(array(object(WrappedListener)), 'module.users.ui.form_edit.new_registration', object(GenericEvent))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/EventDispatcher.php line 46

    at Symfony\Component\EventDispatcher\EventDispatcher->dispatch('module.users.ui.form_edit.new_registration', object(GenericEvent), null)
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/lib/legacy/Zikula/EventManager.php line 95

    at Zikula_EventManager->dispatch('module.users.ui.form_edit.new_registration', object(GenericEvent))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Component/EventDispatcher/Debug/TraceableEventDispatcher.php line 140

    at Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch('module.users.ui.form_edit.new_registration', object(GenericEvent))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/lib/Zikula/Bundle/CoreBundle/Twig/Extension/SimpleFunction/DispatchEventSimpleFunction.php line 41

    at Zikula\Bundle\CoreBundle\Twig\Extension\SimpleFunction\DispatchEventSimpleFunction->dispatchEvent('module.users.ui.form_edit.new_registration')
        in  line 

    at call_user_func_array(array(object(DispatchEventSimpleFunction), 'dispatchEvent'), array('module.users.ui.form_edit.new_registration'))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/app/cache/prod/twig/a6/a64b9cc349f30b5181e1cfc30fd26e825adf7800c6b3f616931cfcc545d20634.php line 128

    at __TwigTemplate_a1d17e2d3a4433116ae209999791066a03c6a0dfe795281ecae2e414fad10220->doDisplay(array('form' => object(FormView), 'domain' => 'zikula', 'app' => object(AppVariable), 'pagevars' => object(ParameterBag), 'themevars' => object(ParameterBag), 'currentUser' => object(CurrentUserApi), 'localeApi' => object(LocaleApi)), array())
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 428

    at Twig_Template->displayWithErrorHandling(array('form' => object(FormView), 'domain' => 'zikula', 'app' => object(AppVariable), 'pagevars' => object(ParameterBag), 'themevars' => object(ParameterBag), 'currentUser' => object(CurrentUserApi), 'localeApi' => object(LocaleApi)), array())
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 396

    at Twig_Template->display(array('form' => object(FormView), 'domain' => 'zikula'))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/twig/twig/lib/Twig/Template.php line 407

    at Twig_Template->render(array('form' => object(FormView), 'domain' => 'zikula'))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/system/ThemeModule/Bridge/Twig/EventEnabledTwigEngine.php line 49

    at Zikula\ThemeModule\Bridge\Twig\EventEnabledTwigEngine->render('@ZikulaZAuthModule/Authentication/register.html.twig', array('form' => object(FormView), 'domain' => 'zikula'))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Bundle/TwigBundle/TwigEngine.php line 97

    at Symfony\Bundle\TwigBundle\TwigEngine->renderResponse('@ZikulaZAuthModule/Authentication/register.html.twig', array('form' => object(FormView), 'domain' => 'zikula'), null)
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Controller/Controller.php line 185

    at Symfony\Bundle\FrameworkBundle\Controller\Controller->render('@ZikulaZAuthModule/Authentication/register.html.twig', array('form' => object(FormView), 'domain' => 'zikula'), null)
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/lib/Zikula/Core/Controller/AbstractController.php line 99

    at Zikula\Core\Controller\AbstractController->render('@ZikulaZAuthModule/Authentication/register.html.twig', array('form' => object(FormView)))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/system/UsersModule/Controller/RegistrationController.php line 178

    at Zikula\UsersModule\Controller\RegistrationController->registerAction(object(Zikula_Request_Http))
        in  line 

    at call_user_func_array(array(object(RegistrationController), 'registerAction'), array(object(Zikula_Request_Http)))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php line 144

    at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Zikula_Request_Http), '1')
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php line 64

    at Symfony\Component\HttpKernel\HttpKernel->handle(object(Zikula_Request_Http), '1', true)
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/DependencyInjection/ContainerAwareHttpKernel.php line 69

    at Symfony\Component\HttpKernel\DependencyInjection\ContainerAwareHttpKernel->handle(object(Zikula_Request_Http), '1', true)
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php line 185

    at Symfony\Component\HttpKernel\Kernel->handle(object(Zikula_Request_Http))
        in /home/www/www.oldtimer-ig-osnabrueck.de/Zikula_Core-1.4.4/index.php line 23