Here is a recurring php error with the basic cart module on drupal 9.3 (see the basiccart.png file).
Symfony\Component\HttpKernel\Exception\ControllerDoesNotReturnResponseException : The controller must return a "Symfony\Component\HttpFoundation\Response" object but it returned null. Did you forget to add a return statement somewhere in your controller? dans () (ligne 98 de /var/www/clients/client1/web160/web/web/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php).
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6.0
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