执行 PHP artisan down / up 命令时报错，请问大神们这是怎么会事 ？

这是composer.json 文件
{
"name": "laravel/laravel",
"description": "The Laravel Framework.",
"keywords": ["framework", "laravel"],
"license": "MIT",
"type": "project",
"require": {
"php": ">=5.6.4",
"laravel/framework": "5.3.",
"predis/predis": "1.0.",
"barryvdh/laravel-debugbar": "^2.3"
},
"require-dev": {
"fzaninotto/faker": "~1.4",
"mockery/mockery": "0.9.",
"phpunit/phpunit": "~5.0",
"symfony/css-selector": "3.1.",
"symfony/dom-crawler": "3.1.*",
"barryvdh/laravel-ide-helper": "^2.2"
},
"autoload": {
"classmap": [
"database",
"app/Libs",
"app/Key"

    ],
    "psr-4": {
        "Chinapnr\\": "app/",
        "AppLibs\\": "app/Libs"
    }
},
"autoload-dev": {
    "classmap": [
        "tests/TestCase.php"
    ]
},
"scripts": {
    "post-root-package-install": [
        "php -r \"file_exists('.env') || copy('.env.example', '.env');\""
    ],
    "post-create-project-cmd": [
        "php artisan key:generate"
    ],
    "post-install-cmd": [
        "Illuminate\\Foundation\\ComposerScripts::postInstall",
        "php artisan optimize"
    ],
    "post-update-cmd": [
        "Illuminate\\Foundation\\ComposerScripts::postUpdate",
        "php artisan ide-helper:generate",
        "php artisan ide-helper:meta",
        "php artisan optimize"
    ]
},
"config": {
    "preferred-install": "dist"
}

}

报错如下 ：
PHP Catchable fatal error: Argument 2 passed to Illuminate\Routing\UrlGenerator::__construct() must be an instance of Illuminate\Http\Request, null given, called in /data/www/hf.otouzi.com/vendor/laravel/framework/src/Illuminate/Routing/RoutingServiceProvider.php on line 62 and defined in /data/www/hf.otouzi.com/vendor/laravel/framework/src/Illuminate/Routing/UrlGenerator.php on line 103

Catchable fatal error: Argument 2 passed to Illuminate\Routing\UrlGenerator::__construct() must be an instance of Illuminate\Http\Request, null given, called in /data/www/hf.otouzi.com/vendor/laravel/framework/src/Illuminate/Routing/RoutingServiceProvider.php on line 62 and defined in /data/www/hf.otouzi.com/vendor/laravel/framework/src/Illuminate/Routing/UrlGenerator.php on line 103