Error: Cannot create references to/from string offsets in D:\math\core\lib\Drupal\Component\Utility\NestedArray.php on line 155 #0 D:\math\core\lib\Drupal\Core\Form\FormBuilder.php(1259): Drupal\Component\Utility\NestedArray::setValue() #1 D:\math\core\lib\Drupal\Core\Form\FormBuilder.php(1005): Drupal\Core\Form\FormBuilder->handleInputElement() #2 D:\math\core\lib\Drupal\Core\Form\FormBuilder.php(1075): Drupal\Core\Form\FormBuilder->doBuildForm() #3 D:\math\core\lib\Drupal\Core\Form\FormBuilder.php(1075): Drupal\Core\Form\FormBuilder->doBuildForm() #4 D:\math\core\lib\Drupal\Core\Form\FormBuilder.php(579): Drupal\Core\Form\FormBuilder->doBuildForm() #5 D:\math\core\lib\Drupal\Core\Form\FormBuilder.php(325): Drupal\Core\Form\FormBuilder->processForm() #6 D:\math\core\modules\views\src\Plugin\views\exposed_form\ExposedFormPluginBase.php(134): Drupal\Core\Form\FormBuilder->buildForm() #7 D:\math\core\modules\views\src\ViewExecutable.php(1243): Drupal\views\Plugin\views\exposed_form\ExposedFormPluginBase->renderExposedForm() #8 D:\math\core\modules\views\src\Plugin\views\display\PathPluginBase.php(392): Drupal\views\ViewExecutable->build() #9 D:\math\core\modules\views\src\Plugin\views\display\Page.php(196): Drupal\views\Plugin\views\display\PathPluginBase->execute() #10 D:\math\core\modules\views\src\ViewExecutable.php(1635): Drupal\views\Plugin\views\display\Page->execute() #11 D:\math\core\modules\views\src\Element\View.php(81): Drupal\views\ViewExecutable->executeDisplay() #12 [internal function]: Drupal\views\Element\View::preRenderViewElement() #13 D:\math\core\lib\Drupal\Core\Security\DoTrustedCallbackTrait.php(101): call_user_func_array() #14 D:\math\core\lib\Drupal\Core\Render\Renderer.php(788): Drupal\Core\Render\Renderer->doTrustedCallback() #15 D:\math\core\lib\Drupal\Core\Render\Renderer.php(374): Drupal\Core\Render\Renderer->doCallback() #16 D:\math\core\lib\Drupal\Core\Render\Renderer.php(204): Drupal\Core\Render\Renderer->doRender() #17 D:\math\core\lib\Drupal\Core\Render\MainContent\HtmlRenderer.php(242): Drupal\Core\Render\Renderer->render() #18 D:\math\core\lib\Drupal\Core\Render\Renderer.php(580): Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() #19 D:\math\core\lib\Drupal\Core\Render\MainContent\HtmlRenderer.php(243): Drupal\Core\Render\Renderer->executeInRenderContext() #20 D:\math\core\lib\Drupal\Core\Render\MainContent\HtmlRenderer.php(132): Drupal\Core\Render\MainContent\HtmlRenderer->prepare() #21 D:\math\core\lib\Drupal\Core\EventSubscriber\MainContentViewSubscriber.php(90): Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() #22 [internal function]: Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray() #23 D:\math\core\lib\Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher.php(142): call_user_func() #24 D:\math\vendor\symfony\http-kernel\HttpKernel.php(174): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() #25 D:\math\vendor\symfony\http-kernel\HttpKernel.php(81): Symfony\Component\HttpKernel\HttpKernel->handleRaw() #26 D:\math\core\lib\Drupal\Core\StackMiddleware\Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle() #27 D:\math\core\lib\Drupal\Core\StackMiddleware\KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle() #28 D:\math\core\lib\Drupal\Core\StackMiddleware\ReverseProxyMiddleware.php(48): Drupal\Core\StackMiddleware\KernelPreHandle->handle() #29 D:\math\core\lib\Drupal\Core\StackMiddleware\NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() #30 D:\math\vendor\stack\builder\src\Stack\StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() #31 D:\math\core\lib\Drupal\Core\DrupalKernel.php(718): Stack\StackedHttpKernel->handle() #32 D:\math\index.php(19): Drupal\Core\DrupalKernel->handle() #33 {main}