Error after add dependencies

I get this error every time I add dependencies on a field. It gone after refresh. But the error appear again after clear cache.

Am I the only one who have this problem?

Notice: Undefined offset: 0 in Drupal\file\Plugin\Field\FieldWidget\FileWidget->formMultipleElements() (line 196 of core/modules/file/src/Plugin/Field/FieldWidget/FileWidget.php).
Drupal\file\Plugin\Field\FieldWidget\FileWidget->formMultipleElements(Object, Array, Object) (Line: 104)
Drupal\Core\Field\WidgetBase->form(Object, Array, Object) (Line: 171)
Drupal\Core\Entity\Entity\EntityFormDisplay->buildForm(Object, Array, Object) (Line: 122)
Drupal\Core\Entity\ContentEntityForm->form(Array, Object) (Line: 115)
Drupal\node\NodeForm->form(Array, Object) (Line: 117)
Drupal\Core\Entity\EntityForm->buildForm(Array, Object)
call_user_func_array(Array, Array) (Line: 518)
Drupal\Core\Form\FormBuilder->retrieveForm('node_download_edit_form', Object) (Line: 275)
Drupal\Core\Form\FormBuilder->buildForm('node_download_edit_form', Object) (Line: 520)
Drupal\conditional_fields\Form\ConditionalFieldEditForm->getDummyField('node', 'download', Array, Object, Array) (Line: 145)
Drupal\conditional_fields\Form\ConditionalFieldEditForm->buildForm(Array, Object, 'node', 'download', 'field_product_category', 'bbbb1d7e-1d0b-40c4-a97a-8b6aac35280e')
call_user_func_array(Array, Array) (Line: 518)
Drupal\Core\Form\FormBuilder->retrieveForm('conditional_field_edit_form_tab', Object) (Line: 275)
Drupal\Core\Form\FormBuilder->buildForm('conditional_field_edit_form_tab', 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: 582)
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: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 99)
Drupal\shield\ShieldMiddleware->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: 666)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)