Illegal offset type in isset or empty in Drupal\Core\Language\LanguageManager->getLanguage()

Warning: Illegal offset type in isset or empty in Drupal\Core\Language\LanguageManager->getLanguage() (line 152 of core/lib/Drupal/Core/Language/LanguageManager.php).
Drupal\Core\Language\LanguageManager->getLanguage(Object) (Line: 434)
token_tokens('site', Array, Array, Array, Object)
call_user_func_array('token_tokens', Array) (Line: 402)
Drupal\Core\Extension\ModuleHandler->invokeAll('tokens', Array) (Line: 304)
Drupal\Core\Utility\Token->generate('site', Array, Array, Array, Object) (Line: 196)
Drupal\Core\Utility\Token->replace('[site:name]', Array, Array) (Line: 53)
_addtocalendar_preprocess_field(Array) (Line: 52)
addtocalendar_preprocess_field(Array, 'field', Array) (Line: 287)
Drupal\Core\Theme\ThemeManager->render('field', Array) (Line: 435)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 448)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 448)
Drupal\Core\Render\Renderer->doRender(Array) (Line: 448)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 55)
__TwigTemplate_d5a35cf4ee35519eca7ef5efec684667d6d8bb0768f52316fc8087749b4ac1e3->doDisplay(Array, Array) (Line: 432)
Twig_Template->displayWithErrorHandling(Array, Array) (Line: 403)
Twig_Template->display(Array) (Line: 411)
Twig_Template->render(Array) (Line: 64)
twig_render_template('modules/contrib/ds/templates/ds-1col.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('ds_1col', Array) (Line: 435)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer->render(Array) (Line: 474)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1) (Line: 43)
__TwigTemplate_6830b588fac1fb3900970806973c7f485a0acf5776e68d433d6a1fb3228ee782->doDisplay(Array, Array) (Line: 432)
Twig_Template->displayWithErrorHandling(Array, Array) (Line: 403)
Twig_Template->display(Array) (Line: 411)
Twig_Template->render(Array) (Line: 64)
twig_render_template('modules/contrib/ds/templates/ds-entity-view.html.twig', Array) (Line: 384)
Drupal\Core\Theme\ThemeManager->render('ds_entity_view', Array) (Line: 435)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195)
Drupal\Core\Render\Renderer->render(Array, ) (Line: 226)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 574)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 227)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 117)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.view', Object) (Line: 149)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 41)
Drupal\pc\Middleware->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 652)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)