Here is the message :
In EntityResolverManager.php line 135
Class "\Drupal\commerce_cart\Controller\CartController" does not exist
The configuration files come from an active site, on which commerce 2.39 and drupal 10.3 are installed.
The only solution I found was to reinstall a new site, then the commerce module and finally reimported all the configurations.
Thanks for your help.
Postponed: needs info
2.39
Cart