Ansicht (view) läuft in "unexpected error" bei Filter des Feld "Datum"

TypeError: Cannot access offset of type string on string in Drupal\views\Plugin\views\filter\Date->acceptExposedInput() (Zeile 153 in /home/www/core/modules/views/src/Plugin/views/filter/Date.php)

#0 /home/www/core/modules/views/src/Form/ViewsExposedForm.php(188): Drupal\views\Plugin\views\filter\Date->acceptExposedInput(Array)
#1 [internal function]: Drupal\views\Form\ViewsExposedForm->submitForm(Array, Object(Drupal\Core\Form\FormState))
#2 /home/www/core/lib/Drupal/Core/Form/FormSubmitter.php(114): call_user_func_array(Array, Array)
#3 /home/www/core/lib/Drupal/Core/Form/FormSubmitter.php(52): Drupal\Core\Form\FormSubmitter->executeSubmitHandlers(Array, Object(Drupal\Core\Form\FormState))
#4 /home/www/core/lib/Drupal/Core/Form/FormBuilder.php(592): Drupal\Core\Form\FormSubmitter->doSubmitForm(Array, Object(Drupal\Core\Form\FormState))
#5 /home/www/core/lib/Drupal/Core/Form/FormBuilder.php(320): Drupal\Core\Form\FormBuilder->processForm('views_exposed_f...', Array, Object(Drupal\Core\Form\FormState))
#6 /home/www/core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginBase.php(134): Drupal\Core\Form\FormBuilder->buildForm('\\Drupal\\views\\F...', Object(Drupal\Core\Form\FormState))
#7 /home/www/core/modules/views/src/ViewExecutable.php(1238): Drupal\views\Plugin\views\exposed_form\ExposedFormPluginBase->renderExposedForm()
#8 /home/www/core/modules/views/src/Plugin/views/display/PathPluginBase.php(392): Drupal\views\ViewExecutable->build()
#9 /home/www/core/modules/views/src/Plugin/views/display/Page.php(196): Drupal\views\Plugin\views\display\PathPluginBase->execute()
#10 /home/www/core/modules/views/src/ViewExecutable.php(1630): Drupal\views\Plugin\views\display\Page->execute()
#11 /home/www/core/modules/views/src/Element/View.php(81): Drupal\views\ViewExecutable->executeDisplay('termine', Array)
#12 [internal function]: Drupal\views\Element\View::preRenderViewElement(Array)
#13 /home/www/core/lib/Drupal/Core/Security/DoTrustedCallbackTrait.php(101): call_user_func_array(Array, Array)
#14 /home/www/core/lib/Drupal/Core/Render/Renderer.php(772): Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_ren...', 'exception', 'Drupal\\Core\\Ren...')
#15 /home/www/core/lib/Drupal/Core/Render/Renderer.php(363): Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array)
#16 /home/www/core/lib/Drupal/Core/Render/Renderer.php(201): Drupal\Core\Render\Renderer->doRender(Array, false)
#17 /home/www/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(241): Drupal\Core\Render\Renderer->render(Array, false)
#18 /home/www/core/lib/Drupal/Core/Render/Renderer.php(564): Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}()
#19 /home/www/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(242): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure))
#20 /home/www/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(132): Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\Core\Routing\CurrentRouteMatch))
#21 /home/www/core/lib/Drupal/Core/EventSubscriber/MainContentViewSubscriber.php(90): Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\Core\Routing\CurrentRouteMatch))
#22 [internal function]: Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object(Symfony\Component\HttpKernel\Event\ViewEvent), 'kernel.view', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher))
#23 /home/www/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(142): call_user_func(Array, Object(Symfony\Component\HttpKernel\Event\ViewEvent), 'kernel.view', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher))
#24 /home/www/vendor/symfony/http-kernel/HttpKernel.php(163): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object(Symfony\Component\HttpKernel\Event\ViewEvent), 'kernel.view')
#25 /home/www/vendor/symfony/http-kernel/HttpKernel.php(80): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1)
#26 /home/www/core/lib/Drupal/Core/StackMiddleware/Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#27 /home/www/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#28 /home/www/core/modules/page_cache/src/StackMiddleware/PageCache.php(106): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#29 /home/www/core/modules/page_cache/src/StackMiddleware/PageCache.php(85): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#30 /home/www/core/modules/ban/src/BanMiddleware.php(50): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#31 /home/www/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\ban\BanMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#32 /home/www/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#33 /home/www/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#34 /home/www/core/lib/Drupal/Core/DrupalKernel.php(709): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true)
#35 /home/www/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request))
#36 {main}
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