Missatge d'error
                    Warning: Undefined array key "#submit_button" in Drupal\Core\Render\Element\Button::preRenderButton() (line 91 of core/lib/Drupal/Core/Render/Element/Button.php).
Drupal\Core\Render\Element\Button::preRenderButton()
call_user_func_array() (Line: 107)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 876)
Drupal\Core\Render\Renderer->doCallback() (Line: 438)
Drupal\Core\Render\Renderer->doRender() (Line: 510)
Drupal\Core\Render\Renderer->doRender() (Line: 510)
Drupal\Core\Render\Renderer->doRender() (Line: 227)
Drupal\Core\Render\Renderer->render() (Line: 491)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 56)
__TwigTemplate_840544bd7f3d0077596e943528d71eb8->doDisplay() (Line: 402)
Twig\Template->yield() (Line: 358)
Twig\Template->display() (Line: 373)
Twig\Template->render() (Line: 51)
Twig\TemplateWrapper->render() (Line: 34)
twig_render_template() (Line: 389)
Drupal\Core\Theme\ThemeManager->render() (Line: 497)
Drupal\Core\Render\Renderer->doRender() (Line: 227)
Drupal\Core\Render\Renderer->render() (Line: 491)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 90)
__TwigTemplate_b7039348511833ace95fcba1640871ab->block_content() (Line: 446)
Twig\Template->yieldBlock() (Line: 73)
__TwigTemplate_b7039348511833ace95fcba1640871ab->doDisplay() (Line: 402)
Twig\Template->yield() (Line: 358)
Twig\Template->display() (Line: 373)
Twig\Template->render() (Line: 51)
Twig\TemplateWrapper->render() (Line: 34)
twig_render_template() (Line: 389)
Drupal\Core\Theme\ThemeManager->render() (Line: 497)
Drupal\Core\Render\Renderer->doRender() (Line: 510)
Drupal\Core\Render\Renderer->doRender() (Line: 227)
Drupal\Core\Render\Renderer->render() (Line: 491)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 154)
__TwigTemplate_99179df520c5c3ebf8829eb9781daabd->block_head() (Line: 446)
Twig\Template->yieldBlock() (Line: 74)
__TwigTemplate_99179df520c5c3ebf8829eb9781daabd->doDisplay() (Line: 402)
Twig\Template->yield() (Line: 358)
Twig\Template->display() (Line: 373)
Twig\Template->render() (Line: 51)
Twig\TemplateWrapper->render() (Line: 34)
twig_render_template() (Line: 389)
Drupal\Core\Theme\ThemeManager->render() (Line: 497)
Drupal\Core\Render\Renderer->doRender() (Line: 227)
Drupal\Core\Render\Renderer->render() (Line: 491)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 106)
__TwigTemplate_21c26453bc113c01077672075a40c203->doDisplay() (Line: 402)
Twig\Template->yield() (Line: 358)
Twig\Template->display() (Line: 373)
Twig\Template->render() (Line: 51)
Twig\TemplateWrapper->render() (Line: 34)
twig_render_template() (Line: 389)
Drupal\Core\Theme\ThemeManager->render() (Line: 497)
Drupal\Core\Render\Renderer->doRender() (Line: 227)
Drupal\Core\Render\Renderer->render() (Line: 162)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 627)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 157)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray() (Line: 246)
Symfony\Component\EventDispatcher\EventDispatcher::Symfony\Component\EventDispatcher\{closure}() (Line: 206)
Symfony\Component\EventDispatcher\EventDispatcher->callListeners() (Line: 56)
Symfony\Component\EventDispatcher\EventDispatcher->dispatch() (Line: 188)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 201)
Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 138)
Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 87)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 53)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 715)
Drupal\Core\DrupalKernel->handle() (Line: 19)