I encounter the same issue with the French version.
It seems like there is a bug in sidebar.php file.
This file is located in : wp-content\themes\[your theme]
Here is the line, I’ve modified:
<form id=”searchform” method=”get” action=”<?php bloginfo(‘home’); ?>”>
Here is the new line:
<form id=”searchform” method=”get” action=”<?php bloginfo(‘home’); ?>/“>
I just add a ‘/’ at the end of action attribute.
