Why I see this errorr after the them was updated??

Hi,
here is another problem with the updated theme: when I add a tour product from the “view ” button I can see the product, but when going to the “tours” section on the main menu bar and clicking on the product it’s showing 404 error not found xampp error.

why I see this??

https://www.loom.com/share/264522933c73401c828ce4509de7ce6f