I want to check requirements with Symfony 4 : http://symfony.com/doc/current/reference/requirements.html
But when I use composer require requirements-checker command, I get this error message :
Fatal error: Container5q18PHK\srcDevDebugProjectContainer::load(): Failed opening required '/var/www/html/demo/var/cache/dev/Container5q18PHK/getSwiftmailer_EmailSender_ListenerService.php' (include_path='.:/usr/local/lib/php') in /var/www/html/demo/var/cache/dev/Container5q18PHK/srcDevDebugProjectContainer.php on line 350
In srcDevDebugProjectContainer.php line 350: Compile Error: Container5q18PHK\srcDevDebugProjectContainer::load(): Failed opening required '/var/www/html/demo/var/cache/dev/Container5q18PHK/getSwiftmailer_EmailSender_ListenerService.php' (include_path='.:/usr/local/lib/php')
I use a Docker container (php:7.2-fpm).
What is the problem?
Thanks.