Since TheMAG version 3, the package does not come with pre-installed Commerce modules. To install TheMAG shop, first you have to download and enable Drupal Commerce modules and then you should import TheMAG Shop configuration. This Procedure requires usage of Composer and Drush.
composer require drupal/commerce
drush en -y commerce_checkout themag_commerce_field_group
By default, the commerce configuration is included in all packages. To import the configuration, run drush command depending on the installation package you have used.
If you have composer managed Drupal or Thunder site, run:
drush cim -y --partial --source=../config/shop_config/
If you run standard Drupal site:
drush cim -y --partial --source=sites/default/config/shop_config/
If you have standard Thunder site:
drush cim -y --partial --source=configuration/thunder_config/shop_config/