how to configure product module under the produc?

Hi,

1. Make sure that the "related products" module is still enabled in the "modules under the product page" setting of the HikaShop configuration and check the settings of that module so that it is properly configured to display related products.

2. It's the default option of the "content on product page" setting of modules which is used when the same setting of the modules is set to "inherit". That setting allows you to tell the system what should be displayed by the module when displayed on a product page. For the related products module, you want to select "related products" in there.

3. It's the default option of the "type of content" setting of modules which is used when the same setting of the modules is set to "inherit". You can ignore it.

4. Yes you can. Turn on the "synchronize" option of the module and instead of using the category configured in the module, it will use the current category of the page to get the list of latest products from the database.