Section With Crad Web Template Issue

I have a brand Grohe, it has 4 products and I have published it on the website, here are its screenshots

Now after that, I go to the web page and use the web template which is the section with the card, so that whenever I click on that card, I am shown only the products of that brand,

I have inserted the root of the brand /Grohe in the URL here.

But when I click on that card, it shows me page not found and sometimes no product found.

My requirement is that when I click on the brand card, I am shown only the product of that brand and not others, how to achieve these requirements.