Search Problem in Cute Bubbles theme

Hello
I am using Cute Bubbles theme. The theme is very excellent. Another one of the best theme i have ever seen.

But important problem is that SEARCH PROBLEM.
The search box is not working.
Searching any content is showing ” Error 404 – Not Found ” on search report.
Page title is coming ” Page not found “

I am not getting solve the search option
Anyone has solve the search option ???
What will be the edit in search.php or style.css files ?

Please help

Best Regards