Error message
Warning: array_flip(): Can only flip string and integer values, entry skipped in Drupal\Core\Entity\EntityStorageBase->loadMultiple() (line 278 of core/lib/Drupal/Core/Entity/EntityStorageBase.php).
Drupal\Core\Entity\EntityStorageBase->loadMultiple(Array) (Line: 262) Drupal\Core\Entity\EntityStorageBase->load(NULL) (Line: 132) Drupal\ygs_popups\Form\BranchesForm->getBranchesList() (Line: 82) Drupal\ygs_popups\Form\BranchesForm->buildForm(Array, Object, '/programs/camp-outdoor-activities/earth-service-corps') call_user_func_array(Array, Array) (Line: 536) Drupal\Core\Form\FormBuilder->retrieveForm('ygs_popups_branches_form', Object) (Line: 283) Drupal\Core\Form\FormBuilder->buildForm('Drupal\ygs_popups\Form\BranchesForm', Object) (Line: 224) Drupal\Core\Form\FormBuilder->getForm('Drupal\ygs_popups\Form\BranchesForm', '/programs/camp-outdoor-activities/earth-service-corps') (Line: 180) Drupal\ygs_popups\Controller\PopupsController->buildPopupContent(, 'nojs') (Line: 90) Drupal\ygs_popups\Controller\PopupsController->branchPopup('nojs') call_user_func_array(Array, Array) (Line: 123) Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 580) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124) Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97) Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 163) Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 74) 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: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 58) Drupal\openy_block_date\StackMiddleware\BlockDateCacheInvalidator->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: 51) Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 692) Drupal\Core\DrupalKernel->handle(Object) (Line: 19)