Recoverable fatal error: Argument 1 passed to ... EntityViewBuilder::view() must implement interface ... , null given, called in FieldCollectionItemsFormatter.php on line 33 Drupal\Core\Entity\EntityViewBuilder->view()

I guess this is more or less the same error but not viewing the field collection but editing:

The website encountered an unexpected error. Please try again later.
TypeError: Argument 1 passed to Drupal\Core\Entity\Entity\EntityFormDisplay::buildForm() must implement interface Drupal\Core\Entity\FieldableEntityInterface, null given, called in /web/modules/contrib/field_collection/src/Plugin/Field/FieldWidget/FieldCollectionEmbedWidget.php on line 71 in Drupal\Core\Entity\Entity\EntityFormDisplay->buildForm() (line 159 of core/lib/Drupal/Core/Entity/Entity/EntityFormDisplay.php).

Drupal\Core\Entity\Entity\EntityFormDisplay->buildForm(NULL, Array, Object) (Line: 71)
Drupal\field_collection\Plugin\Field\FieldWidget\FieldCollectionEmbedWidget->formElement(Object, 0, Array, Array, Object) (Line: 322)
Drupal\Core\Field\WidgetBase->formSingleElement(Object, 0, Array, Array, Object) (Line: 189)
Drupal\Core\Field\WidgetBase->formMultipleElements(Object, Array, Object) (Line: 130)
Drupal\field_collection\Plugin\Field\FieldWidget\FieldCollectionEmbedWidget->formMultipleElements(Object, Array, Object) (Line: 104)
Drupal\Core\Field\WidgetBase->form(Object, Array, Object) (Line: 168)
Drupal\Core\Entity\Entity\EntityFormDisplay->buildForm(Object, Array, Object) (Line: 122)
Drupal\Core\Entity\ContentEntityForm->form(Array, Object) (Line: 115)
Drupal\Core\Entity\EntityForm->buildForm(Array, Object)
call_user_func_array(Array, Array) (Line: 514)
Drupal\Core\Form\FormBuilder->retrieveForm('contenido_canal_edit_form', Object) (Line: 271)
Drupal\Core\Form\FormBuilder->buildForm('contenido_canal_edit_form', Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
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}()
call_user_func_array(Object, Array) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
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: 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: 656)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

This happens only on one of my ECK Entity Bundle with a field collection (there are many where it works), I resaved all configurations. Other thing is that I am not able to add the field collections of this entity bundle to a view, here the preview disappears...
Hope someone can help or there is an other report/patch handling this.

Hi,
Here is small temp patch to fix the issue.

Updated the small patch in order to also handle the formatter. Same simple logics, it just avoids the crash.

This needs to be rerolled against latest dev version.

Rerolled the patch against latest dev version 3.x-dev

Please, review my commit to it.

Corrected patch file according to the version of module -> 8.x-1.0-alpha1

I used this

      if ($item->value !== NULL && ($fc_item = $item->getFieldCollectionItem())) {
        $render_items[] = \Drupal::entityTypeManager()->getViewBuilder('field_collection_item')->view($fc_item);
      }

but really should be something like !$item->isEmpty() yada yada. No ide or time to play

The code for the formatter is completely unchanged so reopening for clarification:

* was this outdated magically by another change somewhere?
* the patch doesn't apply?
* you couldn't replicate?
* is the module totally unsupported?
* and / or were you just randomly closing issues?

Thanks, context is much better.

Patch against tag 8.x-1.0-alpha which I desperately needed whilst (Oh, the irony...) in the middle of converting my field_collections into paragraphs.