Have you tried our Knowledge Base and Download Library yet?
Since its establishment in 1989, Zyxel has evolved from a top modem maker to a strong contender in the broadband solutions market. Today, Zyxel is expanding its Internet access product and service ranges, as well as building new applications for many exciting fields. To us at Zyxel, we are constantly motivated and challenged to create greater value for our customers
Error message
- Warning: Undefined array key 1 in zyxel_webform_webform_submission_form_alter() (line 126 of modules/custom/zyxel_webform/zyxel_webform.module).zyxel_webform_webform_submission_form_alter(Array, Object, 'webform_submission_contact_us_node_30331_add_form') (Line: 552) Drupal\Core\Extension\ModuleHandler->alter('webform_submission_form', Array, Object, 'webform_submission_contact_us_node_30331_add_form') (Line: 78) Drupal\webform\WebformThirdPartySettingsManager->alter('webform_submission_form', Array, Object, 'webform_submission_contact_us_node_30331_add_form') (Line: 678) Drupal\webform\WebformSubmissionForm->buildForm(Array, Object) call_user_func_array(Array, Array) (Line: 540) Drupal\Core\Form\FormBuilder->retrieveForm('webform_submission_contact_us_node_30331_add_form', Object) (Line: 288) Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 48) Drupal\Core\Entity\EntityFormBuilder->getForm(Object, 'add') (Line: 1257) Drupal\webform\Entity\Webform->getSubmissionForm(Array) (Line: 112) Drupal\webform\Element\Webform::preRenderWebformElement(Array) call_user_func_array(Array, Array) (Line: 113) Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 870) Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 432) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 88) __TwigTemplate_264840ad301be297fc56e0e92dcb8d48->doDisplay(Array, Array) (Line: 360) Twig\Template->yield(Array) (Line: 335) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 33) twig_render_template('themes/contrib/bootstrap/templates/field/field.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('field', Array) (Line: 491) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 113) __TwigTemplate_2338b972b1a23aa2b71316f480242ed2->doDisplay(Array, Array) (Line: 360) Twig\Template->yield(Array) (Line: 335) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 33) twig_render_template('themes/custom/zyxel/templates/node/node--webform-page--full.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('node', Array) (Line: 491) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248) Drupal\Core\Render\Renderer->render(Array, ) (Line: 238) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 638) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 239) Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) call_user_func(Array, Object, 'kernel.view', Object) (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186) Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76) Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 53) Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48) Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28) Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32) Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->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: 36) Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 741) Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
- Deprecated function: trim(): Passing null to parameter #1 ($string) of type string is deprecated in zyxel_webform_webform_submission_form_alter() (line 126 of modules/custom/zyxel_webform/zyxel_webform.module).zyxel_webform_webform_submission_form_alter(Array, Object, 'webform_submission_contact_us_node_30331_add_form') (Line: 552) Drupal\Core\Extension\ModuleHandler->alter('webform_submission_form', Array, Object, 'webform_submission_contact_us_node_30331_add_form') (Line: 78) Drupal\webform\WebformThirdPartySettingsManager->alter('webform_submission_form', Array, Object, 'webform_submission_contact_us_node_30331_add_form') (Line: 678) Drupal\webform\WebformSubmissionForm->buildForm(Array, Object) call_user_func_array(Array, Array) (Line: 540) Drupal\Core\Form\FormBuilder->retrieveForm('webform_submission_contact_us_node_30331_add_form', Object) (Line: 288) Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 48) Drupal\Core\Entity\EntityFormBuilder->getForm(Object, 'add') (Line: 1257) Drupal\webform\Entity\Webform->getSubmissionForm(Array) (Line: 112) Drupal\webform\Element\Webform::preRenderWebformElement(Array) call_user_func_array(Array, Array) (Line: 113) Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 870) Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 432) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 88) __TwigTemplate_264840ad301be297fc56e0e92dcb8d48->doDisplay(Array, Array) (Line: 360) Twig\Template->yield(Array) (Line: 335) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 33) twig_render_template('themes/contrib/bootstrap/templates/field/field.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('field', Array) (Line: 491) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 113) __TwigTemplate_2338b972b1a23aa2b71316f480242ed2->doDisplay(Array, Array) (Line: 360) Twig\Template->yield(Array) (Line: 335) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 33) twig_render_template('themes/custom/zyxel/templates/node/node--webform-page--full.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('node', Array) (Line: 491) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248) Drupal\Core\Render\Renderer->render(Array, ) (Line: 238) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 638) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 239) Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) call_user_func(Array, Object, 'kernel.view', Object) (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186) Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76) Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 53) Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48) Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28) Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32) Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->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: 36) Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 741) Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
- Warning: Undefined array key "" in zyxel_webform_webform_submission_form_alter() (line 128 of modules/custom/zyxel_webform/zyxel_webform.module).zyxel_webform_webform_submission_form_alter(Array, Object, 'webform_submission_contact_us_node_30331_add_form') (Line: 552) Drupal\Core\Extension\ModuleHandler->alter('webform_submission_form', Array, Object, 'webform_submission_contact_us_node_30331_add_form') (Line: 78) Drupal\webform\WebformThirdPartySettingsManager->alter('webform_submission_form', Array, Object, 'webform_submission_contact_us_node_30331_add_form') (Line: 678) Drupal\webform\WebformSubmissionForm->buildForm(Array, Object) call_user_func_array(Array, Array) (Line: 540) Drupal\Core\Form\FormBuilder->retrieveForm('webform_submission_contact_us_node_30331_add_form', Object) (Line: 288) Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 48) Drupal\Core\Entity\EntityFormBuilder->getForm(Object, 'add') (Line: 1257) Drupal\webform\Entity\Webform->getSubmissionForm(Array) (Line: 112) Drupal\webform\Element\Webform::preRenderWebformElement(Array) call_user_func_array(Array, Array) (Line: 113) Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 870) Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 432) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 88) __TwigTemplate_264840ad301be297fc56e0e92dcb8d48->doDisplay(Array, Array) (Line: 360) Twig\Template->yield(Array) (Line: 335) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 33) twig_render_template('themes/contrib/bootstrap/templates/field/field.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('field', Array) (Line: 491) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248) Drupal\Core\Render\Renderer->render(Array) (Line: 475) Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 113) __TwigTemplate_2338b972b1a23aa2b71316f480242ed2->doDisplay(Array, Array) (Line: 360) Twig\Template->yield(Array) (Line: 335) Twig\Template->render(Array) (Line: 38) Twig\TemplateWrapper->render(Array) (Line: 33) twig_render_template('themes/custom/zyxel/templates/node/node--webform-page--full.html.twig', Array) (Line: 348) Drupal\Core\Theme\ThemeManager->render('node', Array) (Line: 491) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 248) Drupal\Core\Render\Renderer->render(Array, ) (Line: 238) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 638) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 239) Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) call_user_func(Array, Object, 'kernel.view', Object) (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186) Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76) Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 53) Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48) Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28) Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32) Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->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: 36) Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51) Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 741) Drupal\Core\DrupalKernel->handle(Object) (Line: 19)