Page not found for other languages

I have En as default, and added German.

Now, all links to category pages and product pages go 404:

https://iparvan/de/produkt-kategorie/women/

But this url would work:

https://iulianparvan.com/de/product-category/women/

So it seems the category name translation breaks the functionality.
Any idea how can this be avoided? i’m sure it’s something simple.