Find specific product page - Price not visible just one item

[JohannAnton]

Hi everyone,

Noob in prestashop running currently 1.7.6.2 + customized (basically) warehouse theme.

All working but just one specific item/product is not showing price nor discount like every others do.

Both in category and product itself page. I didn't change anything at all.

Since I'm starting to understand folder structure...

Dumb question: how can I find a specific product/item page in order to modify/read/check its code. Dunno if I'm looking for a .tpl file or what exactly?

I have two ideas for solving this price not showing problem: 

1. Insert missing code from another working item and "adapt" it to this product.

2. Create a manual duplicate of this product (aka new ID) and see if it works like that.

Thanks in advance for your help

Edited November 29 by JohannAnton
Adding that the theme is warehouse but a custom version of it (see edit history)