laravel passport 4.0 error to send post client request

I followed the step guide ( https://laravel.com/docs/5.5/passport ), but when I try to get the token I get this error:

Symfony\Component\Debug\Exception\FatalErrorException: Class 'Fideloper\Proxy\TrustProxies' not found in file /var/www/html/test/app/Http/Middleware/TrustProxies.php on line 8 Stack trace: 1. Symfony\Component\Debug\Exception\FatalErrorException->() /var/www/html/test/app/Http/Middleware/TrustProxies.php:8

I generate the client_secret and the client id with the command:

php artisan passport:client --personal

I need just a token for communication from an external client consumer.

via Chebli Mohamed