This is the message I get when trying to activate Cornerstone… Any ideas on what to do next.
Fatal error: Cannot redeclare class Cornerstone_Plugin_Base in C:\Program Files (x86)\EasyPHP-DevServer-14.1VC9\data\localweb\My Projects - Semester 4\wordpress-4.8.1-en_AU\wordpress\wp-content\plugins\cornerstone\includes\utility\plugin-base.php on line 6