Hi,
You have to check the configuration of the two modules you displayed under the product page.
Be sure that the vendor have some products and check the categories where the products are.
Then, you can modify the product listing module in order to checks the "Associated category" and "Sub elements filter" settings.
You have to select a base category which contains the products and you have to use a filter like "all sub elements" in order to be sure that you will display some products.
Some settings like "recently viewed" can also affect the display of the module.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.