Problem with the pagination of blog posts. RT-THEME 18

wordpress

#1

We are creating new posts for our Blog section in our webpage. We are using the RT-THEME 18. There is a pagination where you can see older posts but it is not working. It is just possible to see the last page (for example the third page) but when you put the second page or the first one it is showing a message saying “Problem 404 Apologies, but the page you requested could not be found. Perhaps searching will help.”.

The option “Pagination” situated inside of “Blog Posts” in “Template Builder” is enable and still it is not working.

What can we do or where is the problem?

Thank you,
Emilio