Leads to blank white page

Hi,

I am using the following code, but when I attempt a search, all I am taken to is a blank white page. Using the shortcode is just the same.

Any help would be much appreciated.

<?php if(function_exists('sbc')){
    sbc();
} else { ?>
    <form role='search" method='get' id='searchform' class='searchForm' action='[fn function='get_home_url']'>
  <div>
    <input type='text' value='' name='s' id='s' style='width:190px;'>
    <input type='submit' id='searchsubmit' value='Search' class='btn'>
  </div>
</form>
<?php } ?>

https://www.ads-software.com/extend/plugins/search-by-category/