title: server:run Exception There are no commands defined in the "server" namespace
body: <p>When I run the server using <code>php bin/console server:run</code> I get the following error.
  <code>There are no commands defined in the "server" namespace.</code></p>
  
  <p>When I run <code>php bin/console</code> command I egt the following output. Which does't show any server: commands.</p>
  
  <pre><code>Symfony 3.3.0-DEV (kernel: app, env: dev, debug: true)
  
  Usage:
    command [options] [arguments]
  
  Options:
    -h, --help            Display this help message
    -q, --quiet           Do not output any message
    -V, --version         Display this application version
        --ansi            Force ANSI output
        --no-ansi         Disable ANSI output
    -n, --no-interaction  Do not ask any interactive question
    -e, --env=ENV         The environment name [default: "dev"]
        --no-debug        Switches off debug mode
    -v|vv|vvv, --verbose  Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug
  
  Available commands:
    about                                   Displays information about the current project
    help                                    Displays help for a command
    list                                    Lists commands
   app
    app:download-beameemail                 download beame emails.
    app:download-businessunits              download businessunits.
    app:download-drivers                    download drivers.
    app:download-fleets                     download fleets.
    app:download-fmpositions                download fm_positions.
    app:download-fmtrips                    download fm_trips.
    app:download-fmunits                    download fm_units.
    app:download-skypositions               download skytrack_positions.
    app:download-skyunits                   download skytrack_units.
    app:download-vehicles                   download vehicles.
   assets
    assets:install                          Installs bundles web assets under a public web directory
   cache
    cache:clear                             Clears the cache
    cache:pool:clear                        Clears cache pools
    cache:warmup                            Warms up an empty cache
   config
    config:dump-reference                   Dumps the default configuration for an extension
   debug
    debug:config                            Dumps the current configuration for an extension
    debug:container                         Displays current services for an application
    debug:event-dispatcher                  Displays configured listeners for an application
    debug:router                            Displays current routes for an application
    debug:swiftmailer                       [swiftmailer:debug] Displays current mailers for an application
    debug:translation                       Displays translation messages information
    debug:twig                              Shows a list of twig functions, filters, globals and tests
   doctrine
    doctrine:cache:clear-collection-region  Clear a second-level cache collection region.
    doctrine:cache:clear-entity-region      Clear a second-level cache entity region.
    doctrine:cache:clear-metadata           Clears all metadata cache for an entity manager
    doctrine:cache:clear-query              Clears all query cache for an entity manager
    doctrine:cache:clear-query-region       Clear a second-level cache query region.
    doctrine:cache:clear-result             Clears result cache for an entity manager
    doctrine:database:create                Creates the configured database
    doctrine:database:drop                  Drops the configured database
    doctrine:database:import                Import SQL file(s) directly to Database.
    doctrine:ensure-production-settings     Verify that Doctrine is properly configured for a production environment.
    doctrine:generate:crud                  [generate:doctrine:crud] Generates a CRUD based on a Doctrine entity
    doctrine:generate:entities              [generate:doctrine:entities] Generates entity classes and method stubs from your mapping information
    doctrine:generate:entity                [generate:doctrine:entity] Generates a new Doctrine entity inside a bundle
    doctrine:generate:form                  [generate:doctrine:form] Generates a form type class based on a Doctrine entity
    doctrine:mapping:convert                [orm:convert:mapping] Convert mapping information between supported formats.
    doctrine:mapping:import                 Imports mapping information from an existing database
    doctrine:mapping:info                   
    doctrine:query:dql                      Executes arbitrary DQL directly from the command line.
    doctrine:query:sql                      Executes arbitrary SQL directly from the command line.
    doctrine:schema:create                  Executes (or dumps) the SQL needed to generate the database schema
    doctrine:schema:drop                    Executes (or dumps) the SQL needed to drop the current database schema
    doctrine:schema:update                  Executes (or dumps) the SQL needed to update the database schema to match the current mapping metadata.
    doctrine:schema:validate                Validate the mapping files.
   fos
    fos:js-routing:debug                    Displays currently exposed routes for an application
    fos:js-routing:dump                     Dumps exposed routes to the filesystem
   generate
    generate:bundle                         Generates a bundle
    generate:command                        Generates a console command
    generate:controller                     Generates a controller
   lint
    lint:twig                               Lints a template and outputs encountered errors
    lint:xliff                              Lints a XLIFF file and outputs encountered errors
    lint:yaml                               Lints a file and outputs encountered errors
   router
    router:match                            Helps debug routes by simulating a path info match
   security
    security:check                          Checks security issues in your project dependencies
    security:encode-password                Encodes a password.
   swiftmailer
    swiftmailer:email:send                  Send simple email message
    swiftmailer:spool:send                  Sends emails from the spool
   translation
    translation:update                      Updates the translation file
  </code></pre>
  
  <p>I've tried to fix it by running <code>composer require symfony/symfony</code> and <code>composer update</code> but it still doesn't show.
  Is there anything else that I can try?</p>
  
  <p>Edit below is my php info from <code>php -version</code></p>
  
  <pre><code>PHP 7.0.15-0ubuntu0.16.04.4 (cli) ( NTS )
  Copyright (c) 1997-2017 The PHP Group
  Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
      with Zend OPcache v7.0.15-0ubuntu0.16.04.4, Copyright (c) 1999-2017, by Zend Technologies
      with Xdebug v2.4.0, Copyright (c) 2002-2016, by Derick Rethans
  </code></pre>
  
  <p>EDIT 2</p>
  
  <p>the directory <code>vendor\symfon\symfony\src\Symfony\Bundle\FrameworkBundle\Command</code> exists and contains the following files</p>
  
  <pre><code>AboutCommand.php
  AbstractConfigCommand.php
  AssetsInstallCommand.php
  CacheClearCommand.php
  CachePoolClearCommand.php
  CacheWarmupCommand.php
  ConfigDebugCommand.php
  ConfigDumpReferenceCommand.php
  ContainerAwareCommand.php
  ContainerDebugCommand.php
  EventDispatcherDebugCommand.php
  RouterDebugCommand.php
  RouterMatchCommand.php
  TranslationDebugCommand.php
  TranslationUpdateCommand.php
  WorkflowDumpCommand.php
  XliffLintCommand.php
  YamlLintCommand.php
  </code></pre>