Issue #3411384 by phthlaap, venkatadapa, alecsmrekar, plach, alexpott, heddn,...

Issue #3411384 by phthlaap, venkatadapa, alecsmrekar, plach, alexpott, heddn, Graber: Error: Call to a member function label() on null in Drupal\menu_link_content\Form\MenuLinkContentForm->form() (line 99 of /var/www/html/docroot/core/modules/menu_link_content/src/Form/MenuLinkContentForm.php)

(cherry picked from commit 84432de2)