Active_WP on "[Plugin: Duplicator] MySQLi requirements failed on package installation"

I have a similar question but it relates to copying a live site to the desktop. I have tried with 3 separate sub-domains (I am developing websites there and want to do this now on my desktop) and continually receive the MySQLi error. I cannot find anything on the net that will fix it. Have been at this nearly all day. Any help other than the link to the php website would be greatly appreciated.
I am using WAMP with PHP 5.5.12