Installation:

Step 1. Add module to the composer.json

composer require qbo/module-configurableproduct

Step 2. Enable the module:

php bin/magento module:enable Qbo_ConfigurableProduct

Step 4 Upgrade the Magento application

php bin/magento setup:upgrade

Step 5. Generate DI configuration

php bin/magento setup:di:compile

Step 6. Clear cache

php bin/magento cache:clean