我想在我的symfony 3.4.3项目中添加codeception（^ 2.3）。
我按照“入门”指南中的步骤操作，但是一旦我尝试运行codecept run，我就会收到以下错误消息：
==== Redirecting to Composer-installed version in vendor/codeception ====
Codeception PHP Testing Framework v2.3.7
Powered by PHPUnit 6.4.4 by Sebastian Bergmann and contributors.
PHP Fatal error: Uncaught Error: Call to undefined method Symfony\Component\DependencyInjection\ContainerBuilder::isCompiled() in ~/project/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ContainerBuilder.php:981
Stack trace:
#0 ~/project/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ContainerBuilder.php(132): Symfony\Component\DependencyInjection\ContainerBuilder->setDefinition('service_contain...', Object(Symfony\Component\DependencyInjection\Definition))
#1 ~/project/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php(807): Symfony\Component\DependencyInjection\ContainerBuilder->__construct()
#2 ~/project/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php(759): Symfony\Component\HttpKernel\Kernel->getContainerBuilder()
#3 ~/project/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Ker in ~/project/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ContainerBuilder.php on line 981
Fatal error: Uncaught Error: Call to undefined method Symfony\Component\DependencyInjection\ContainerBuilder::isCompiled() in ~/project/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ContainerBuilder.php:981
Stack trace:
#0 ~/project/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ContainerBuilder.php(132): Symfony\Component\DependencyInjection\ContainerBuilder->setDefinition('service_contain...', Object(Symfony\Component\DependencyInjection\Definition))
#1 ~/project/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php(807): Symfony\Component\DependencyInjection\ContainerBuilder->__construct()
#2 ~/project/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Kernel.php(759): Symfony\Component\HttpKernel\Kernel->getContainerBuilder()
#3 ~/project/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/Ker in ~/project/vendor/symfony/symfony/src/Symfony/Component/DependencyInjection/ContainerBuilder.php on line 981
我已经尝试清除所有环境的缓存。还有什么我可以尝试的吗？