The parameter "C3" must be defined.

Hallo zusammen,
der CM mosert beim WarmUp mit folgender Meldung:

Code:

---

/opt/plesk/php/7.2/bin/php '-q' '/var/www/vhosts/beispiel.tld/httpdocs/live/vendor/contao/manager-bundle/bin/contao-console' 'cache:clear' '--env=prod' '-vvv'  2>&1

 // Clearing the cache for the prod environment with debug false                                                       

 // Warming up cache...                                                                                               


In appContao_ManagerBundle_HttpKernel_ContaoKernelProdContainer.php line 1480:
                                                                             
  [Symfony\Component\DependencyInjection\Exception\InvalidArgumentException] 
  The parameter "C3" must be defined.                                       
                                                                             

Exception trace:
 () at /var/www/vhosts/beispiel.tld/httpdocs/live/var/cache/pro_/Container5WrmSGx/appContao_ManagerBundle_HttpKernel_ContaoKernelProdContainer.php:1480
Container5WrmSGx\appContao_ManagerBundle_HttpKernel_ContaoKernelProdContainer->getParameter() at /var/www/vhosts/beispiel.tld/httpdocs/live/vendor/symfony/dependency-injection/ParameterBag/ContainerBag.php:41
 Symfony\Component\DependencyInjection\ParameterBag\ContainerBag->get() at /var/www/vhosts/beispiel.tld/httpdocs/live/vendor/symfony/framework-bundle/Routing/Router.php:167
 Symfony\Bundle\FrameworkBundle\Routing\Router->Symfony\Bundle\FrameworkBundle\Routing\{closure}() at n/a:n/a
 preg_replace_callback() at /var/www/vhosts/beispiel.tld/httpdocs/live/vendor/symfony/framework-bundle/Routing/Router.php:176
etc...

---

Was passiert da?
Wieso wird ein eigener Cache-Ordner angelegt, hab ich mir hier was komisches eingefangen?

Es ist ein Contao 4.7.6 mit PHP 7.2.18 und MariaDB10.3

Viele Grüße, Kai