The site fall with Errors, TypeError: strlen(): Argument #1

@JohnTheWriter98 Can you please provide the complete error message?

Thank you for reporting this issue.

As suggested by @keshavv I would need more context about this error in order to reproduce and fix it.

As-is I unfortunately cannot know what it causing the error.

Looking forward to hearing from you @JohnTheWriter98

Yes sure, this is the full error message.

The website encountered an unexpected error. Please try again later.
TypeError: strlen(): Argument #1 ($string) must be of type string, stdClass given in strlen() (line 477 of core/lib/Drupal/Component/Utility/Unicode.php).
strlen(Object) (Line: 477)
Drupal\Component\Utility\Unicode::validateUtf8(Object) (Line: 65)
Drupal\Component\Utility\Xss::filter(Object, Array) (Line: 751)
Drupal\Core\Render\Renderer->ensureMarkupIsSafe(Array) (Line: 380)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 479)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 71)
__TwigTemplate_bf314473f3a26d67b8d8d77fccf21d82->doDisplay(Array, Array) (Line: 405)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 378)
Twig\Template->display(Array) (Line: 390)
Twig\Template->render(Array) (Line: 55)
twig_render_template('themes/custom/socialfood_theme/templates/input/form-element-label.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('form_element_label', Array) (Line: 433)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 479)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 95)
__TwigTemplate_8a8718cd1fea1c801ae0a0953a3f7876->doDisplay(Array, Array) (Line: 405)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 378)
Twig\Template->display(Array) (Line: 390)
Twig\Template->render(Array) (Line: 55)
twig_render_template('themes/contrib/bootstrap/templates/input/form-element.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('form_element', Array) (Line: 489)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 446)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 446)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 479)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 52)
__TwigTemplate_a8231413fe402320bf0fe3c89adde0ef->doDisplay(Array, Array) (Line: 405)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 378)
Twig\Template->display(Array) (Line: 390)
Twig\Template->render(Array) (Line: 55)
twig_render_template('themes/contrib/bootstrap/templates/views/views-exposed-form.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('views_exposed_form', Array) (Line: 433)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array) (Line: 479)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 84)
__TwigTemplate_6a86d9becee3ae4c3ad0b08c7f4af6dc->doDisplay(Array, Array) (Line: 405)
Twig\Template->displayWithErrorHandling(Array, Array) (Line: 378)
Twig\Template->display(Array) (Line: 390)
Twig\Template->render(Array) (Line: 55)
twig_render_template('themes/contrib/bootstrap/templates/views/views-view.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('views_view', Array) (Line: 433)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 446)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array, ) (Line: 242)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 580)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 243)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 132)
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: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 174)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 81)
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: 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: 50)
Drupal\ban\BanMiddleware->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: 718)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Thank you for posting the full log. Unfortunately, it does not help to identify what is the wrong value. Somehow, something in your template form-element-label.html.twig is receiving and/or processing an object instead of a string.

Can you try to disable this specific template temporarly?

Can you test your View with a default theme (e.g. Olivero, Stark...) and confirm if the issue is still here?

Hi, I have the same issue, it happens when you select the option "Dropdown" and "Show hierarchy in dropdown". Then you choose "Radios/Checkboxes" and when you save, the error appears.

Also, when you uncheck the hierarchy option, the checkboxes dosen't keep the hierarchical order of the taxonomy terms, so it is another issue.

Thanks in advance for help.