Symfony\Component\Debug\Exception\FatalThrowableError Class 'BookStack\Uploads\Log' not found #2449

Hello, i have a freh installation on ubuntu 18.04.

When i create a new User with Mailsend i become this error
with a local create user on cli
root@wiki:/var/www/bookstack# php artisan bookstack:create-admin

Please specify an email address for the new admin user:

test@example.com

Please specify an name for the new admin user:

test

Please specify a password for the new admin user:

Symfony\Component\Debug\Exception\FatalThrowableError : Class 'BookStack\Uploads\Log' not found

at /var/www/bookstack/app/Uploads/UserAvatars.php:32
28| $avatar = $this->saveAvatarImage($user);
29| $user->avatar()->associate($avatar);
30| $user->save();
31| } catch (Exception $e) {

32| Log::error('Failed to save user avatar image');
33| }
34| }
35|
36| /**

Exception trace:

1 BookStack\Uploads\UserAvatars::fetchAndAssignToUser(Object(BookStack\Auth\User))
/var/www/bookstack/app/Auth/UserRepo.php:265

2 BookStack\Auth\UserRepo::downloadAndAssignUserAvatar(Object(BookStack\Auth\User))
/var/www/bookstack/app/Console/Commands/CreateAdmin.php:77

Please use the argument -v to see more details.

The User is createt but with mail he dont send the mail. the testmail is still running

Thanks for help