php - cvc-complex-type.2.4.a: Invalid content was found starting with element 'foo'

I am usinglaravel 4.2. My project runs on axampp installation and mydatabase ismysql/phpmyadmin. I have installed theide helper plugin from barryvdh. After installing the plugin I get some weird errors in myvendor/symfony/routing/Symfony/Component/Routing.

cvc-complex-type.2.4.a: Invalid content was found starting with element 'foo'. One of '{"http://symfony.com/schema/routing":default, "http://symfony.com/schema/routing":requirement, "http://symfony.com/schema/routing":option}' is expected. nonvalidroute.xml   /laravelProject/vendor/symfony/routing/Symfony/Component/Routing/Tests/Fixtures line 11 XML Problem
cvc-complex-type.2.4.a: Invalid content was found starting with element 'foo'. One of '{"http://symfony.com/schema/routing":import, "http://symfony.com/schema/routing":route}' is expected.    nonvalidnode.xml    /laravelProject/vendor/symfony/routing/Symfony/Component/Routing/Tests/Fixtures line 7  XML Problem
cvc-complex-type.4: Attribute 'id' must appear on element 'route'.  missing_id.xml  /laravelProject/vendor/symfony/routing/Symfony/Component/Routing/Tests/Fixtures line 7  XML Problem
The end-tag for element type "route" must end with a '>' delimiter. nonvalid.xml    /laravelProject/vendor/symfony/routing/Symfony/Component/Routing/Tests/Fixtures line 11 XML Problem
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Mycomposer.json plugin looks like that:

{
    "name": "laravel/laravel",
    "description": "The Laravel Framework.",
    "keywords": ["framework", "laravel"],
    "require": {
        "laravel/framework": "4.0.*",
        "cartalyst/sentry": "2.0.*",
        "barryvdh/laravel-ide-helper": "1.*",
        "fzaninotto/faker": "1.3.*@dev"
    },
    "autoload": {
        "classmap": [
            "app/commands",
            "app/controllers",
            "app/models",
            "app/database/migrations",
            "app/database/seeds",
            "app/tests/TestCase.php"
        ]
    },
    "scripts": {
        "post-install-cmd": [
            "php artisan optimize"
        ],
        "pre-update-cmd": [
            "php artisan clear-compiled"
        ],
        "post-update-cmd": [
            "php artisan optimize"
        ],
        "post-update-cmd": [
             "php artisan ide-helper:generate"
        ],       
        "post-create-project-cmd": [
            "php artisan key:generate"
        ]
    },
    "config": {
        "preferred-install": "dist"
    },
    "minimum-stability": "dev"
}
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Any idea why I am getting this exception and how to fix it?

I appreciate your answer!