Breadcrumbs problem

-- url of the page with the problem -- : goldfieldfireworks.com/index.php/our-fir...4-neon-morning-glory
-- HikaShop version -- : 6.0.0
-- Joomla version -- : 5.3.2
-- PHP version -- : 8.2.29
-- Browser(s) name and version -- : Firefox 128.13.0esr

I have 2 sites. On one of them, the breadcrumb module is not working correctly:

goldfieldfireworks.com/index.php/our-fir...ct/1817-black-hornet
On that page, you can see that the category is shown, but it is not clickable. I want the user to be able to click on the category in the breadcrumb, to see other products. Also, the name of the current product is not shown in the breadcrumbs.

By comparison, on my other site, the breadcrumbs work perfectly:
fireworksland.com/index.php/home/firewor...hard-core-pyro-shirt
You can see that the breadcrumb module shows the category as clickable, and the name of the product is included in the breadcrumbs.

How do I fix this so that the first site shows the category as clickable, and the name of the product is in the breadcrumb?

Thank you for your help.