problem! search by date range

Hi, I have a problem.
when I do a search by date range throws me this url:
http: // localhost / post_date = 01/25/2016 + 11/02/2016
but I redireciona to the homepage.

but if I make another search in this way
http: // localhost / s = meeting & post_date = 25/01/2016 + 02/11/2016
if I throw result.

It is problem of plugin?

I’m using the free version.

https://ww.wp.xz.cn/plugins/search-filter/