BuddyPress Group Calendar Breaks Site

When I attempt to install BuddyPress Group Calendar from the WPMU dashboard it just says ‘error’ and then my site and dashboard both go blank and I can’t access either one. The first time it occurred I went into the FTP and removed the plugin. However, when I attempted to install it again the same thing occurred only now the site is broken and the plugin isn’t showing in the FTP. Please advise. Thanks in advance.