problems with the tours in spanish

Hi,

We’re experiencing issues with our website in the Catalan and Spanish languages. When clicking on a tour, it appears to show an error 404. However, we don’t encounter this problem in English.

This issue might have arisen due to updating WordPress to version 6.5, which could be incompatible with our theme?

Could you please assist us? Our website is currently not functioning properly.

Here you have one url that doesn’t work but it happens with all spanish and catalan tours

https://www.barcelona-discovery.com/tours/ruta-guiada-amb-ebike-per-montjuic

Please if you need our details . Also please check if our theme is totally update because we have our theme costumize
Awaiting for your news
Regards