diff -u b/core/modules/media/src/Form/MediaInlineForm.php b/core/modules/media/src/Form/MediaInlineForm.php
--- b/core/modules/media/src/Form/MediaInlineForm.php
+++ b/core/modules/media/src/Form/MediaInlineForm.php
@@ -100,7 +100,7 @@
     // @see \Drupal\media\Plugin\Field\FieldWidget\MediaImageWidget::process().
     foreach (['#alt_field_required', '#title_field_required'] as $extra_image_field_attribute) {
       if (isset($entity_form[$source_field]['widget'][0][$extra_image_field_attribute])) {
-        $entity_form[$source_field]['widget'][0][$extra_image_field_attribute]['#access'] = FALSE;
+        $entity_form[$source_field]['widget'][0][$extra_image_field_attribute] = FALSE;
       }
     }