The single service page (custom post type) is working. I have set the "Custom rewrite slug" field and the "Custom archive slug" field to "our-service". And build the template for the Service. It works.
So, for the single service page (custom post type) problem is solved.
The service category (taxonomy) still doesn't work. I have set the "Custom rewrite slug" field to "our-service". It doesn't work, but when I set the "Custom rewrite slug" field to other than "our-service", it works. How to fix this problem? 🙂