Composer autoloader not working - php

Question

I'll be as concise and precise as I can. I am thankful for all help!
My system: Symfony 3.3.8, PHP 5.6.25. IDE : PhpStorm
Error encountered :
Attempted to load class "GuzzleBundle" from namespace "EightPoints\Bundle\GuzzleBundle".
Did you forget a "use" statement for another namespace?
My other third-party bundles, KnPMenu or FOSUser, work perfectly.
All these bundles have been installed with composer require (packagist), composer update and then added in AppKernel.
This error pops up on every page of the website as soon as I add the new EightPoints\Bundle\GuzzleBundle\GuzzleBundle(),in the AppKernel.
I tried to composer dump-autoload after this process, but to no avail. I also added the bundle configuration in app/confing/config.yml.
Here are my files :
AppKernel.php
<?php
use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\Config\Loader\LoaderInterface;
class AppKernel extends Kernel
{
public function registerBundles()
{
$bundles = [
new Symfony\Bundle\FrameworkBundle\FrameworkBundle(),
new Symfony\Bundle\SecurityBundle\SecurityBundle(),
new Symfony\Bundle\TwigBundle\TwigBundle(),
new Symfony\Bundle\MonologBundle\MonologBundle(),
new Symfony\Bundle\SwiftmailerBundle\SwiftmailerBundle(),
new Symfony\Bundle\AsseticBundle\AsseticBundle(),
new Doctrine\Bundle\DoctrineBundle\DoctrineBundle(),
new Sensio\Bundle\FrameworkExtraBundle\SensioFrameworkExtraBundle(),
new EightPoints\Bundle\GuzzleBundle\GuzzleBundle(),
new Knp\Bundle\MenuBundle\KnpMenuBundle(),
new FOS\UserBundle\FOSUserBundle(),
new AppBundle\AppBundle(),
new BaseBundle\BaseBundle(),
];
if (in_array($this->getEnvironment(), ['dev', 'test'], true)) {
$bundles[] = new Symfony\Bundle\DebugBundle\DebugBundle();
$bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
$bundles[] = new Sensio\Bundle\DistributionBundle\SensioDistributionBundle();
if ('dev' === $this->getEnvironment()) {
$bundles[] = new Sensio\Bundle\GeneratorBundle\SensioGeneratorBundle();
$bundles[] = new Symfony\Bundle\WebServerBundle\WebServerBundle();
}
}
return $bundles;
}
public function getRootDir()
{
return __DIR__;
}
public function getCacheDir()
{
return dirname(__DIR__) . '/var/cache/' .$this->getEnvironment();
}
public function getLogDir()
{
return dirname(__DIR__) . '/var/logs';
}
public function registerContainerConfiguration(LoaderInterface $loader)
{
$loader->load($this->getRootDir().'/config/config_'.$this->getEnvironment().'.yml');
}
}
composer.json
{
"name": "symfony/framework-standard-edition",
"license": "MIT",
"type": "project",
"description": "The \"Symfony Standard Edition\" distribution",
"autoload": {
"psr-4": {
"AppBundle\\": "src/AppBundle",
"BaseBundle\\": "src/BaseBundle"
},
"classmap": [ "app/AppKernel.php", "app/AppCache.php" ]
},
"autoload-dev": {
"psr-4": { "Tests\\": "tests/" },
"files": [ "vendor/symfony/symfony/src/Symfony/Component/VarDumper/Resources/functions/dump.php" ]
},
"require": {
"php": ">=5.5.9",
"components/jquery": "^3.1",
"doctrine/doctrine-bundle": "^1.6",
"doctrine/orm": "^2.5",
"eightpoints/guzzle-bundle": "^6.1",
"friendsofsymfony/user-bundle": "~2.0",
"incenteev/composer-parameter-handler": "^2.0",
"knplabs/knp-menu-bundle": "^2.0",
"oyejorge/less.php": "v1.7.0.14",
"sensio/distribution-bundle": "^5.0.19",
"sensio/framework-extra-bundle": "^3.0.2",
"symfony/assetic-bundle": "^2.8",
"symfony/monolog-bundle": "^3.1.0",
"symfony/polyfill-apcu": "^1.0",
"symfony/swiftmailer-bundle": "^2.3.10",
"symfony/symfony": "3.3.8",
"twbs/bootstrap": "^3.3",
"twig/twig": "^1.0||^2.0"
},
"require-dev": {
"sensio/generator-bundle": "^3.0",
"symfony/phpunit-bridge": "^3.0"
},
"scripts": {
"symfony-scripts": [
"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::prepareDeploymentTarget"
],
"post-install-cmd": [
"#symfony-scripts"
],
"post-update-cmd": [
"#symfony-scripts"
]
},
"config": {
"platform": {
"php": "5.6.25"
},
"sort-packages": true
},
"extra": {
"symfony-app-dir": "app",
"symfony-bin-dir": "bin",
"symfony-var-dir": "var",
"symfony-web-dir": "web",
"symfony-tests-dir": "tests",
"symfony-assets-install": "relative",
"incenteev-parameters": {
"file": "app/config/parameters.yml"
},
"branch-alias": {
"dev-master": "3.3-dev"
}
}
}
I don't know why I get this error when I try to use this bundle, please help me!

Answer 1

Error resolved. Seems like PhpStorm excluded vendor folder.
So, vendors were not uploaded to server (wamp64/www).
Vendors were in my local project file by the way... sadly.
After a full upload of vendors in the server, everything seems to work.
Is it normal ? Have I done a begginer mistake ?
Thank you alot four your fast help guys !