Error loading 404 page, when URL depth is longer

Hi,

Is there a way to fix the 404 error page loading all posts in the blog if the URL slug depth is longer?

For Eg: demo.olympusthemes.com/arke/finance will load the 404 error page.

But from 4th / theme starts loading all posts. eg: demo.olympusthemes.com/arke/finance/stock/

Appreciate your help in advance.