PHP notices/warnings on Manage display page

Problem/Motivation

On the Manage display page of custom entity types, a number or PHP notices and warning are displayed. On the same page the usual Entity Print fields (View Word Document, View EPub, View PDF) are absent. The latter is probably the cause of these notices/warnings.

Notice: Undefined index: #value in Drupal\field_ui\Element\FieldUiTable->tablePreRender() (line 62 of core/modules/field_ui/src/Element/FieldUiTable.php).
Notice: Undefined index: #region_callback in Drupal\field_ui\Element\FieldUiTable->tablePreRender() (line 70 of core/modules/field_ui/src/Element/FieldUiTable.php).
Warning: call_user_func() expects parameter 1 to be a valid callback, no array or string given in Drupal\field_ui\Element\FieldUiTable->tablePreRender() (line 70 of core/modules/field_ui/src/Element/FieldUiTable.php).
Notice: Undefined index: weight in Drupal\field_ui\Element\FieldUiTable->tablePreRender() (line 77 of core/modules/field_ui/src/Element/FieldUiTable.php).

To reproduce:
- Create a custom entity type with drupal console generate:entity:content
- Go to the Manage display page of the entity type

Proposed resolution

Remaining tasks