Error message
Warning: Undefined array key "chosen_seat" in Drupal\sas_services\Form\PurchaseSeat\Preview->buildForm() (line 55 of modules/custom/sas_services/src/Form/PurchaseSeat/Preview.php).
Drupal\sas_services\Form\PurchaseSeat\Preview->buildForm() call_user_func_array() (Line: 528) Drupal\Core\Form\FormBuilder->retrieveForm() (Line: 279) Drupal\Core\Form\FormBuilder->buildForm() (Line: 73) Drupal\Core\Controller\FormController->getContentResult() call_user_func_array() (Line: 123) Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 627) Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121) Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97) Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 183) 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)Warning: foreach() argument must be of type array|object, null given in Drupal\sas_services\Form\PurchaseSeat\Preview->buildForm() (line 56 of modules/custom/sas_services/src/Form/PurchaseSeat/Preview.php).
Drupal\sas_services\Form\PurchaseSeat\Preview->buildForm() call_user_func_array() (Line: 528) Drupal\Core\Form\FormBuilder->retrieveForm() (Line: 279) Drupal\Core\Form\FormBuilder->buildForm() (Line: 73) Drupal\Core\Controller\FormController->getContentResult() call_user_func_array() (Line: 123) Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 627) Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121) Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97) Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 183) 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)