Error message

• Notice: Undefined index: node_gallery_file_display in field_extra_fields_get_display() (line 697 of /var/www/html/drupal7/modules/field/field.module).
• Notice: Trying to access array offset on value of type null in _field_extra_fields_pre_render() (line 731 of /var/www/html/drupal7/modules/field/field.module).
• Notice: Trying to access array offset on value of type null in _field_extra_fields_pre_render() (line 733 of /var/www/html/drupal7/modules/field/field.module).