BuddyPress Group Calendar takes site down

I have BuddyPress installed and tried multiple times to install BuddyPress Group Calendar from the WPMU Dev dashboard.

Every time the blue link turned to "error" and every time my site became the white screen of death.

Site recovered only by FTPing to the server and deleting the plugin folder.

???

WordPress 3.6

Other plugins activated:
BackupBuddy
BuddyPress
CommentLuv
Events +
JetPack
MarketPress
Pretty Link Pro
WPMU Dev Dashboard
WPMU Dev Videos

Theme:
Thesis 2.1.2

Site: http://homeschool-open-source.com