500 error - Permission denied - ps_files_cleanup_dir

Hi,

I’m new to Shopware.
I feel like this error is not related to Shopware but I need to be sure.
The back-office is working correctly. The front-end returns 500 error …
I’ve installed a fresh 6.3 Shopware installation with bin/console and composer.

Am I missing something in the .env ?
In the back-office there is a default saleschannel „storefront“ and the domain is correctly set there.

The given error in the logs is not saying much:

[06-May-2021 07:28:30 UTC] PHP Fatal error: Uncaught ErrorException: Notice: SessionHandler::gc(): ps_files_cleanup_dir: opendir(/var/cpanel/php/sessions/ea-php73) failed: Permission denied (13) in /shopware/vendor/symfon$
Stack trace:
#0 /shopware/vendor/symfony/http-foundation/Session/Storage/Proxy/SessionHandlerProxy.php(83): Symfony\Component\HttpFoundation\Session\Storage\Handler\StrictSessionHandler->gc(1440)
#1 [internal function]: Symfony\Component\HttpFoundation\Session\Storage\Proxy\SessionHandlerProxy->gc(1440)
#2 /shopware/vendor/symfony/http-foundation/Session/Storage/NativeSessionStorage.php(156): session_start()
#3 /shopware/vendor/symfony/http-foundation/Session/Session.php(57): Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start()
#4 /shopware/vendor/shopware/storefront/Framework/Routing/StorefrontSubscriber.php(171): Symfony\Component\HttpFoundation\Session\Session->start() in /shopware/vendor/symfony/http-foundation/Session/Storage/P$

It was due to cache.