Can delete user only with option "Delete the account and its content"

If I want to delete a user account with the first three setting

Disable the account and keep its content.
Disable the account and unpublish its content.
Delete the account and make its content belong to the guest user.

I get following Fatal error:

The website encountered an unexpected error. Please try again later.
Recoverable fatal error: Object of class Drupal\Core\Field\FieldItemList could not be converted to string in Drupal\Core\Database\Statement->execute() (line 59 of core/lib/Drupal/Core/Database/Statement.php).
Drupal\Core\Database\Statement->execute(Array, Array) (Line: 624)
Drupal\Core\Database\Connection->query('DELETE FROM {comment_notify_user_settings}
WHERE uid = :db_condition_placeholder_0', Array, Array) (Line: 87)
Drupal\Core\Database\Driver\mysql\Connection->query('DELETE FROM {comment_notify_user_settings}
WHERE uid = :db_condition_placeholder_0', Array, Array) (Line: 55)
Drupal\Core\Database\Query\Delete->execute() (Line: 61)
comment_notify_delete_user_notification_setting(Object) (Line: 256)
comment_notify_user_cancel(Array, Object, 'user_cancel_block')
call_user_func_array('comment_notify_user_cancel', Array) (Line: 402)
......

But with the last option "Delete the account and its content" its no problem to delete the account.

After unistalling the module I dont have the problem

I reinstalled the module and there were also following notices:

Notice: Trying to get property of non-object in comment_notify_form_user_form_alter() (line 215 of modules/contrib/comment_notify/comment_notify.module).
comment_notify_form_user_form_alter(Array, Object, 'user_form') (Line: 501)
Drupal\Core\Extension\ModuleHandler->alter('form', Array, Object, 'user_form') (Line: 819)
Drupal\Core\Form\FormBuilder->prepareForm('user_form', Array, Object) (Line: 272)
Drupal\Core\Form\FormBuilder->buildForm('user_form', Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
......

Notice: Trying to get property of non-object in comment_notify_form_user_form_alter() (line 231 of modules/contrib/comment_notify/comment_notify.module).
comment_notify_form_user_form_alter(Array, Object, 'user_form') (Line: 501)
Drupal\Core\Extension\ModuleHandler->alter('form', Array, Object, 'user_form') (Line: 819)
Drupal\Core\Form\FormBuilder->prepareForm('user_form', Array, Object) (Line: 272)
Drupal\Core\Form\FormBuilder->buildForm('user_form', Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
.....

As long i dont want to keep content of users its not a problem ;-)