"Sorry, no posts matched your criteria" when searching

Hi Again!

I noticed that the “search” feature isn’t working for me. The basis of my website/blog is for visitors to be able to search it and since changing the theme, no results show up in the search no matter how specific the terms are.

I tried searching on your “demo” site and noticed the same thing. If we click on categories, it works fine, though.

Thanks in advance,
Taccara