Error: Class "Drupal\group\Entity\GroupRelationship" not found in Drupal\socialbase\Plugin\Preprocess\Node->preprocessElement() (line 168 of themes/contrib/socialbase/src/Plugin/Preprocess/Node.php).

Problem/Motivation

If I´m using the search function I get this error:

Auf der Website ist ein unerwarteter Fehler aufgetreten. Versuchen Sie es später noch einmal.

Error: Class "Drupal\group\Entity\GroupRelationship" not found in Drupal\socialbase\Plugin\Preprocess\Node->preprocessElement() (line 168 of themes/contrib/socialbase/src/Plugin/Preprocess/Node.php).

Drupal\socialblue\Plugin\Preprocess\Node->preprocessElement(Object, Object) (Line: 51)
Drupal\bootstrap\Plugin\Preprocess\PreprocessBase->preprocess(Array, 'node', Array) (Line: 1442)
Drupal\bootstrap\Bootstrap::preprocess(Array, 'node', Array) (Line: 118)
bootstrap_preprocess(Array, 'node', Array)
call_user_func_array('bootstrap_preprocess', Array) (Line: 261)
Drupal\Core\Theme\ThemeManager->render('node', Array) (Line: 480)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240)
Drupal\Core\Render\Renderer->render(Array) (Line: 475)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 67)
__TwigTemplate_426e785dbc203e9b409dd06e3547391a->block_rows(Array, Array) (Line: 430)
Twig\Template->yieldBlock('rows', Array, Array) (Line: 52)
__TwigTemplate_426e785dbc203e9b409dd06e3547391a->doDisplay(Array, Array) (Line: 360)
Twig\Template->yield(Array) (Line: 335)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 39)
twig_render_template('themes/contrib/socialbase/templates/views/views-view-unformatted.html.twig', Array) (Line: 348)
Drupal\Core\Theme\ThemeManager->render('views_view_unformatted', Array) (Line: 480)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 493)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240)
Drupal\Core\Render\Renderer->render(Array) (Line: 475)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 122)
__TwigTemplate_4dc974c58b301145227bdbd55f364140->doDisplay(Array, Array) (Line: 360)
Twig\Template->yield(Array) (Line: 335)
Twig\Template->render(Array) (Line: 38)
Twig\TemplateWrapper->render(Array) (Line: 39)
twig_render_template('themes/contrib/socialbase/templates/views/views-view.html.twig', Array) (Line: 348)
Drupal\Core\Theme\ThemeManager->render('views_view', Array) (Line: 480)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 493)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 240)
Drupal\Core\Render\Renderer->render(Array, ) (Line: 238)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 627)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 231)
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: 58)
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: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
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: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes