Occ files_external:export fail

Hi, we are happy user of files_external with some samba shares. We need a tip for occ files_external:export. This command failes.

This command gives a list of external storage for user username:

bash-4.4$ ./occ files_external:list username

We would like to export this list to adopt as a “template” for other user with occ files_external:import ...

But the export is not working:

bash-4.4$ ./occ files_external:export username
PHP Fatal error:  Declaration of Symfony\Component\Console\Input\ArrayInput::hasParameterOption($values, bool $onlyParams = false) must be compatible with Symfony\Component\Console\Input\InputInterface::hasParameterOption($values, $onlyParams = false) in /srv/www/PATH/apps/bookmarks/vendor/symfony/console/Input/ArrayInput.php on line 56

What could be the reason for that?

Nextcloud 19.0.3
php-fpm 7.4
PostgreSQL 12