Event translation

Problem/Motivation

The Event Instance entity can not be translated. When the translation page is submited, an error is returned:

Error: Call to a member function getFieldStorageDefinition() on null in Drupal\Core\Field\Entity\BaseFieldOverride->getFieldStorageDefinition() (line 120 of core/lib/Drupal/Core/Field/Entity/BaseFieldOverride.php).

Steps to reproduce

1. Enable content translation module
2. Go to content translation /admin/config/regional/content-language
3. Enable Event Instance entity
4. Select Description in field list.
5. Submit

After selecting this the content translation page will break and will not allow fixing it or resaving in UI.