Problems with expanded search

Hi everyone,

i am using the Hueman theme in combination with ShiftNav Pro and since a few weeks i´ve got a problem with the expanded search in my topbar navigation. I´ve got this included before my toggle:

<div class=”toggle-search”><i class=”fa fa-search”></i></div>
<div class=”search-expand”>
<div class=”search-expand-inner”>
<form method=”get” class=”searchform themeform” action=”http://xxx.de/”&gt;
<div>
<input type=”text” class=”search” name=”s” onblur=”if(this.value==”)this.value=’Suche’;” onfocus=”if(this.value==’Suche’)this.value=”;” value=”Suche”>
</div>
</form>
</div>
</div>

The searchform doesn´t open anymore in the mobile view, everything else is still working fine.

Do you have any suggestions, what could be the reason for this problem?

Best regards
Dominik