Fatal error after installation

[pefstra]

After installation the application is down. When remove laravel-backup everything is ok. We use php8.0.1 and Laravel 8.12
The error log:

19437#19437: *25368446 FastCGI sent in stderr: "PHP message: PHP Fatal error: Uncaught ReflectionException: Class translator does not exist in /home/vendor/laravel/framework/src/Illuminate/Container/Container.php:830
Stack trace:
#0 /home/vendor/laravel/framework/src/Illuminate/Container/Container.php(830): ReflectionClass->__construct('translator')
#1 /home/vendor/laravel/framework/src/Illuminate/Container/Container.php(712): Illuminate\Container\Container->build('translator')
#2 /home/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(826): Illuminate\Container\Container->resolve('translator', Array, true)
#3 /home/vendor/laravel/framework/src/Illuminate/Container/Container.php(651): Illuminate\Foundation\Application->resolve('translator', Array)
#4 /home/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(811): Illuminate\Container\C...PHP message: PHP Fatal error: Uncaught ReflectionException: Class translator does not exist in /home/vendor/laravel/framework/src/Illuminate/Container/Container.php:830
Stack trace:
#0 /home/vendor/laravel/framework/src/Illuminate/Container/Container.php(830): ReflectionClass->__construct('translator')
#1 /home/vendor/laravel/framework/src/Illuminate/Container/Container.php(712): Illuminate\Container\Container->build('translator')
#2 /home/vendor/laravel/framework/src/Illuminate/Foundation/Application.php(826): Illuminate\Container\Container->resolve('translator', Array, true)
#3 /home/vendor/laravel/framework/src/Illuminate/Container/Container.php(651): Illuminate\Foundation\Application->resolve('translator', Array)
#4 /home/vendor/laravel/framework/src/Illuminate