I've installed several Wikis and never had a problem with Auto Suggest in the search box. It's not working on my current wiki. I've tried suggestions found elsewhere using the different variables to no avail:
$wgUseAjax; $wgEnableMWSuggest; $wgVectorUseSimpleSearch;
This stuff always works; what could be different about this wiki?
MediaWiki 1.19.13 PHP 5.2.17 (cgi-fcgi) MySQL 5.1.73-cll URL: https://neucart.com/wiki/Main_Page