I don't understand the following problem:

> 
> [Symfony\Component\Config\Definition\Exception\InvalidConfigurationException]
>  You must setup php-http/httplug-bundle to use the default http client
>  service. 
> 
> 
> Script
>  Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::clearCache
>  handling the post-update-cmd event terminated with an exception [RuntimeException] 
>  An error occurred when executing the "'cache:clear --no-warmup'" > command:  
> 
>  [Symfony\Component\Config\Definition\Exception\InvalidConfigurati  
> 
>  onException]  
> 
>  You must setup php-http/httplug-bundle to use the default http client service. 
> 
> 
> 

Below is my file composer.json

```
{
"name": "symfony/framework-standard-edition",
"license": "MIT",
"type": "project",
"description": "The \"Symfony Standard Edition\" distribution",
"autoload": {
    "psr-0": { "": "src/", "SymfonyStandard": "app/" }
},
"require": {
    "php": ">=5.3.3",
    "symfony/symfony": "2.8.*",
    "doctrine/orm": "~2.2,>=2.2.3",
    "doctrine/doctrine-bundle": "dev-master",
    "doctrine/doctrine-fixtures-bundle": "dev-master",
    "twig/extensions": "~1.0",
    "symfony/assetic-bundle": "~2.3",
    "symfony/swiftmailer-bundle": "~2.3",
    "symfony/monolog-bundle": "~2.4",
    "sensio/distribution-bundle": "~3.0",
    "sensio/framework-extra-bundle": "~3.0",
    "incenteev/composer-parameter-handler": "~2.0",
    "sonata-project/admin-bundle": "~2.3@dev",
    "sonata-project/doctrine-orm-admin-bundle": "2.3.4",
    "knplabs/knp-disqus-bundle": "dev-master",
    "hwi/oauth-bundle": "dev-master",
    "kartik-v/bootstrap-star-rating": "dev-master",
    "azine/socialbar-bundle": "dev-master",
    "gregwar/captcha-bundle": "dev-master",
    "knplabs/knp-paginator-bundle": "~2.4",
    "php-http/guzzle6-adapter": "1.1.1",
    "php-http/httplug-bundle": "1.7.1"
},
    "require-dev": {
    "sensio/generator-bundle": "~2.3",
    "incenteev/composer-parameter-handler": "~2.0",
    "friendsofsymfony/user-bundle":" ~2.0@dev"
},
"scripts": {
    "post-root-package-install": [
        "SymfonyStandard\\Composer::hookRootPackageInstall"
    ],
    "post-install-cmd": [
        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::removeSymfonyStandardFiles"
    ],
    "post-update-cmd": [
        "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile",
        "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::removeSymfonyStandardFiles"
    ]
},
"config": {
    "bin-dir": "bin"
},
"extra": {
    "symfony-app-dir": "app",
    "symfony-web-dir": "web",
    "symfony-bin-dir": "bin",
    "symfony-var-dir": "var",
    "incenteev-parameters": {
        "file": "app/config/parameters.yml"
    },
    "branch-alias": {
        "dev-master": "2.5-dev"
    }
}

```

}