Update-Fehler: The doctrine/orm package is required when the doctrine.orm config is

Beim Update von 4.4.x auf 4.9 über den Contao Manager kam es zu folgendem Fehler:

vendor/bin/contao-console list
In Configuration.php line 321:

The doctrine/orm package is required when the doctrine.orm config is set.

Was bedeutet das und vor allem: Wie lässt sich das lösen?

Umgebung: IONOS Webhosting Paket, aktuell unter PHP 7.4 durch die Contao 4.4.x.

Code:

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In Configuration.php line 321:
                                                                           
  The doctrine/orm package is required when the doctrine.orm config is set. 
                                                                           
Script Contao\ManagerBundle\Composer\ScriptHandler::initializeApplication handling the post-install-cmd event terminated with an exception
In ScriptHandler.php line 113:
                                                                             
  An error occurred while executing the "contao:install-web-dir" command:     
  In Configuration.php line 321:                                             
                                                                             
                                                                             
    The doctrine/orm package is required when the doctrine.orm config is set.

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