No packages load

Hello,

I work with Drupal 7.89.
I have installed Composer on my serveur in good path (sites/default/files/composer).
I have installed the module "composer manager" (no error)
But, no packages show on the page "admin/config/system/composer-manager".
Packages are available in "sites/all/vendor".
composer.json indicate the good path : "vendor-dir": "../../../all/vendor"

I don't unserstand how to retrieves/show my packages.
Someone could help me ?

Thanks.
Fabien.