WSOD with incompatible ECA API

I think I created a model without giving it a title and get an unstable site with WSCOD with following message:

The website encountered an unexpected error. Please try again later.
TypeError: Return value of Drupal\eca\Plugin\ECA\Event\EventBase::eventName() must be of the type string, null returned in Drupal\eca\Plugin\ECA\Event\EventBase->eventName() (line 24 of modules/contrib/eca/src/Plugin/ECA/Event/EventBase.php).

Drupal\eca\Plugin\ECA\Event\EventBase->eventName() (Line: 135)
Drupal\eca\Entity\EcaStorage->loadByEvent(Object, 'account.set') (Line: 105)
Drupal\eca\Processor->execute(Object, 'account.set') (Line: 44)
Drupal\eca\EventSubscriber\EcaBase->onEvent(Object, 'account.set', Object)
call_user_func(Array, Object, 'account.set', Object) (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'account.set') (Line: 65)
Drupal\Core\Session\AccountProxy->setAccount(Object) (Line: 79)
Drupal\Core\EventSubscriber\AuthenticationSubscriber->onKernelRequestAuthenticate(Object, 'kernel.request', Object)
call_user_func(Array, Object, 'kernel.request', Object) (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.request') (Line: 134)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 80)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 42)
Drupal\webform_product\RedirectMiddleware->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)