Error: Cannot create references to/from string offsets in Drupal\Component\Utility\NestedArray::setValue()

Error: Cannot create references to/from string offsets in Drupal\Component\Utility\NestedArray::setValue() (line 155 of /var/www/test/web/core/lib/Drupal/Component/Utility/NestedArray.php) #0 /var/www/test/web/core/lib/Drupal/Core/Form/FormBuilder.php(1243): Drupal\Component\Utility\NestedArray::setValue(Array, Array, NULL) #1 /var/www/test/web/core/lib/Drupal/Core/Form/FormBuilder.php(986): Drupal\Core\Form\FormBuilder->handleInputElement('views_exposed_f...', Array, Object(Drupal\Core\Form\FormState)) #2 /var/www/test/web/core/lib/Drupal/Core/Form/FormBuilder.php(1056): Drupal\Core\Form\FormBuilder->doBuildForm('views_exposed_f...', Array, Object(Drupal\Core\Form\FormState)) #3 /var/www/test/web/core/lib/Drupal/Core/Form/FormBuilder.php(1056): Drupal\Core\Form\FormBuilder->doBuildForm('views_exposed_f...', Array, Object(Drupal\Core\Form\FormState)) #4 /var/www/test/web/core/lib/Drupal/Core/Form/FormBuilder.php(557): Drupal\Core\Form\FormBuilder->doBuildForm('views_exposed_f...', Array, Object(Drupal\Core\Form\FormState)) #5 /var/www/test/web/core/lib/Drupal/Core/Form/FormBuilder.php(314): Drupal\Core\Form\FormBuilder->processForm('views_exposed_f...', Array, Object(Drupal\Core\Form\FormState)) #6 /var/www/test/web/core/modules/views/src/Plugin/views/exposed_form/ExposedFormPluginBase.php(135): Drupal\Core\Form\FormBuilder->buildForm('views_exposed_f...', Object(Drupal\Core\Form\FormState)) #7 /var/www/test/web/core/modules/views/src/ViewExecutable.php(1235): Drupal\views\Plugin\views\exposed_form\ExposedFormPluginBase->renderExposedForm() #8 /var/www/test/web/core/modules/views/src/Plugin/views/display/PathPluginBase.php(390): Drupal\views\ViewExecutable->build() #9 /var/www/test/web/core/modules/views/src/Plugin/views/display/Page.php(168): Drupal\views\Plugin\views\display\PathPluginBase->execute() #10 /var/www/test/web/core/modules/views/src/ViewExecutable.php(1627): Drupal\views\Plugin\views\display\Page->execute() #11 /var/www/test/web/core/modules/views/src/Element/View.php(77): Drupal\views\ViewExecutable->executeDisplay('page_1', Array) #12 [internal function]: Drupal\views\Element\View::preRenderViewElement(Array) #13 /var/www/test/web/core/lib/Drupal/Core/Render/Renderer.php(378): call_user_func(Array, Array) #14 /var/www/test/web/core/lib/Drupal/Core/Render/Renderer.php(195): Drupal\Core\Render\Renderer->doRender(Array, false) #15 /var/www/test/web/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(226): Drupal\Core\Render\Renderer->render(Array, false) #16 /var/www/test/web/core/lib/Drupal/Core/Render/Renderer.php(576): Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() #17 /var/www/test/web/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(227): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #18 /var/www/test/web/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php(117): Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object(Symfony\Component\HttpFoundation\Request), Object(Drupal\Core\Routing\CurrentRouteMatch)) #19 /var/www/test/web/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)) #20 /var/www/test/web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(108): Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object(Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent), 'kernel.view', Object(Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher)) #21 /var/www/test/vendor/symfony/http-kernel/HttpKernel.php(158): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.view', Object(Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent)) #22 /var/www/test/vendor/symfony/http-kernel/HttpKernel.php(68): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #23 /var/www/test/web/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #24 /var/www/test/web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #25 /var/www/test/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #26 /var/www/test/web/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #27 /var/www/test/web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #28 /var/www/test/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(50): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #29 /var/www/test/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #30 /var/www/test/web/core/lib/Drupal/Core/DrupalKernel.php(657): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #31 /var/www/test/web/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #32 {main}.