Site keeps going blank white after install and activate plugins

This is part of a new multi site network where the multi sites exist for to organize the site, members do not get a site- the get a buddypress login.

I have been adding plugins one at a time, currently I just tried to install the simple share adder buttons- it works great on the main domain, but after installing it on this subdomain the site went white.

I uninstalled the plugin and it's still white. Please help.