892 Deleting the Album redirects to the 500 error

[email protected] added a feedback(#2563423) from https://app.greatalbum.net/album/210/edit:

Steps to reproduce:

1. Navigate to the Album
2. Press "Edit" button
3. Click on "Delete" button
4. Validate the process


Expected Result: The album is deleted

Actual Result: The following error is displayed:
"The website encountered an unexpected error. Please try again later.
Error: Call to a member function id() on null in Drupal\great_custom\Form\DeleteGroupContentConfirmationForm->getAdditionalGroups() (line 110 of modules/custom/greatalbum_admin/src/Form/DeleteGroupContentConfirmationFormTrait.php).
Drupal\great_custom\Form\DeleteGroupContentConfirmationForm->getAdditionalGroups(Object, Object) (Line: 41)
Drupal\great_custom\Form\DeleteGroupContentConfirmationForm->addStat(Array, Object) (Line: 45)
Drupal\great_custom\Form\DeleteGroupContentConfirmationForm->buildForm(Array, Object, Object)
call_user_func_array(Array, Array) (Line: 532)
Drupal\Core\Form\FormBuilder->retrieveForm('great_custom_group_flexible_group_delete_form', Object) (Line: 278)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 91)
Drupal\Core\Controller\FormController->getContentResult(Object, Object) (Line: 39)
Drupal\layout_builder\Controller\LayoutBuilderHtmlEntityFormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber
{closure}() (Line: 573)
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: 151)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel->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: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)"

Attachment: https://static.userback.io/57763/project/71541/feedback/2563423/attachment/__________________________2023_04_14____09.38.01.png

Session details:

• Feedback ID: #2563423
• Browser: Chrome 111.0.0.0 (macOS)
• Rating: N/A
• Window Size: 1389 x 796
• Resolution: 1440 x 900
• DPI: 1
• Colour Depth: 24-bit
• Category: Album

View feedback details in Userback:
https://app.userback.io/viewer/36775/71541/25634233JjBlK1f/