[Solution] Laravel Fortify - Invalid Signature

AppServiceProvider.php

 if($this->app->environment('production'))
 {
     \URL::forceScheme('https');
 }

TrustProxies.php

<?php

namespace App\Http\Middleware;

use Illuminate\Http\Request;
use Fideloper\Proxy\TrustProxies as Middleware;

class TrustProxies extends Middleware
{
    protected $proxies = '*';

    protected $headers = Request::HEADER_X_FORWARDED_FOR | Request::HEADER_X_FORWARDED_HOST | Request::HEADER_X_FORWARDED_PORT | Request::HEADER_X_FORWARDED_PROTO;
}