Fatal error entering infusionsoft settings

just installed on local server for new site.

I entered the infusionsoft setting and resulted in fatal error:
Fatal error: Cannot redeclare class Config in /Applications/XAMPP/xamppfiles/lib/php/Config.php on line 44

http://screencast.com/t/7QHYyMyQYMeu

Is this because it is on desktopserver and not live site?

https://ww.wp.xz.cn/plugins/infusionsoft/