Website encountered and unexpected error when accessing civicrm/admin/civiconfig?reset=1

The error shows up in the drupal logs after clicking on the manage configurations sets menu item : TypeError: Symfony\Component\Process\Process::__construct(): Argument #1 (closed) ($command) must be of type array, string given, called in .../web/sites/default/civicrm/ext/configitems/Civi/ConfigItems/Commands/Git.php on line 59 in Symfony\Component\Process\Process->__construct() (line 143 of .../vendor/symfony/process/Process.php).

This is a drupal 10 site running PHP 8.1 with CiviCRM 5.56.0 so I wonder if it is a PHP compatibility issue but I don't have much civi/drupal/ PHP coding experience so I really have no clue.

Any help appreciated.