Yii 2 CRUD url issue

I have created a model class product and active queries and generated CRUD using gii. here is the structure.

backend
 common/models
  product

 controllers
  ProductContoller
 
 views/layouts
   product
    _form
    _search
   create
   index
   update
   view

Also I have enabled mu urlManager inside main.php

'urlManager' => [
        'enablePrettyUrl' => true,
        'showScriptName' => false,
        'rules' => [
        ],
    ],

when I try to access the model using yii2-ecommerce.localhost/product

getting 404 error.

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