Help for Aimeos

Hi , i've overwrited existing template and add new components but i've this ambiguous error please help -> Argument 1 passed to Aimeos\Client\Html\Base::setView() must implement interface Aimeos\MW\View\Iface, null given, called in C:\xampp\htdocs\agribusiness\ext\ai-client-html\client\html\src\Clie...

I extended the managers items for the product domain ( the only thing i add is a new column ) but now after getting item by manager->getItem() for the catalog domain manager the ->getRefItems('product') dont show anything !

How can we add a new client role instead of "editor" or "administrator" then we can make command :
php artisan aimeos:account --newuserrole "newuser@mail.com"