Why are pages missing in wordpress pagination?

Question

WordPress

There is a problem and I can’t figure it out in any way, on the blog pages 8 and 9 (the oldest articles), they don’t open and write the error "404 Not Found
Apologies, but the page you requested could not be found. Perhaps searching will help." .
What could be the problem? Can anyone come across?
Here is actually the eighth page linuxfan.com.ua/page/8

Answer 1

Open the wp template, see how pagination is implemented in the theme, open the database, check the correctness of the entries.