类'；Mews净化器净化器服务提供商'；找不到

我想我在尝试访问我的laravel网站时遇到了这个错误：

 Symfony ' Component ' Debug ' Exception ' FatalErrorException (E_UNKNOWN)
Class 'Mews'Purifier'PurifierServiceProvider' not found 

我试着做composer update，但我得到了这个错误：

 composer update
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
  Problem 1
    - The requested package mews/purifier could not be found in any version, there may be a typo in the package name.
Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.
Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.

我也尝试了上述链接，但没有发生任何事情。这是我的composer.json 的内容

{
        "name": "laravel/laravel",
        "description": "The Laravel Framework.",
        "keywords": ["framework", "laravel"],
        "license": "MIT",
        "require": {
                "laravel/framework": "4.2.*",
                "vtalbot/markdown": "1.*",
                "mews/purifier": "dev-master-14",
                "hybridauth/hybridauth": "dev-master#6d89473",
                "symfony/yaml": "dev-master",
        "greggilbert/recaptcha": "1.*",
                "php": ">=5.3.0",
        "ext-curl": "*",
        "ext-json": "*",
        "gloudemans/shoppingcart": "~1.2",
        "stripe/stripe-php":"dev-master"
        },
        "autoload": {
                "classmap": [
                        "app/commands",
                        "app/controllers",
                        "app/models",
                        "app/database/migrations",
                        "app/database/seeds",
                        "app/tests/TestCase.php"
                ],
                "files" : [
                        "vendor/stripe/stripe-php/lib/Stripe.php"
                ]
        }, "scripts": {
                "post-install-cmd": [
                        "php artisan clear-compiled",
                        "php artisan optimize"
                ],
                "post-update-cmd": [
                        "php artisan clear-compiled",
                        "php artisan optimize"
                ],
                "post-create-project-cmd": [
                        "php artisan key:generate"
                ]
        },
        "config": {
                "preferred-install": "dist"
        },
        "minimum-stability": "dev"
}

有什么想法吗？

我遇到这个错误是因为我试图将"mews/purifier": "dev-master-14",替换为"mews/purifier": "dev-master",，但在重命名控制器文件后，我再次遇到错误，就像Laravel 4中的Composer Update错误一样。。。

你知道我的案子吗？任何帮助都将不胜感激。。

我也尝试composer install，但我得到了这个错误：

composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. Run update to update them.
Nothing to install or update
Generating autoload files
> php artisan clear-compiled
PHP Fatal error:  Class 'Mews'Purifier'PurifierServiceProvider' not found in /var/www/staging.theskitrip.ca/protected/vendor/laravel/framework/src/Illuminate/Foundation/ProviderRepository.php on line 157
{"error":{"type":"Symfony''Component''Debug''Exception''FatalErrorException","message":"Class 'Mews''Purifier''PurifierServiceProvider' not found","file":"'/var'/www'/staging.theskitrip.ca'/protected'/vendor'/laravel'/framework'/src'/Illuminate'/Foundation'/ProviderRepository.php","line":157}}Script php artisan clear-compiled handling the post-install-cmd event returned with an error

  [RuntimeException]
  Error Output: PHP Fatal error:  Class 'Mews'Purifier'PurifierServiceProvider' not foun
  d in /var/www/staging.theskitrip.ca/protected/vendor/laravel/framework/src/Illuminate/
  Foundation/ProviderRepository.php on line 157

install [--prefer-source] [--prefer-dist] [--dry-run] [--dev] [--no-dev] [--no-plugins] [--no-custom-installers] [--no-autoloader] [--no-scripts] [--no-progress] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--ignore-platform-reqs] [--] [<packages>]...