Does't work with the icons

[neurotic]

When i try to include an icon of a view mode selector the system shows this warning:

Warning: foreach() argument must be of type array|object, bool given in Drupal\file\Element\ManagedFile::valueCallback() (line 150 of core/modules/file/src/Element/ManagedFile.php).
Drupal\file\Element\ManagedFile::valueCallback(Array, , Object)
call_user_func_array(Array, Array) (Line: 1277)
Drupal\Core\Form\FormBuilder->handleInputElement('field_config_edit_form', Array, Object) (Line: 1000)
Drupal\Core\Form\FormBuilder->doBuildForm('field_config_edit_form', Array, Object) (Line: 1070)
Drupal\Core\Form\FormBuilder->doBuildForm('field_config_edit_form', Array, Object) (Line: 1070)
Drupal\Core\Form\FormBuilder->doBuildForm('field_config_edit_form', Array, Object) (Line: 1070)
Drupal\Core\Form\FormBuilder->doBuildForm('field_config_edit_form', Array, Object) (Line: 1070)
Drupal\Core\Form\FormBuilder->doBuildForm('field_config_edit_form', Array, Object) (Line: 574)
Drupal\Core\Form\FormBuilder->processForm('field_config_edit_form', Array, Object) (Line: 320)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 73)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber{closure}() (Line: 564)
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: 158)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 80)
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: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->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: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

And the icon it's not saved.