Blank Page on bp-social activation

I have a non-multisite WP installation. I have only two plugins: AKISMET and BUDDYPRESS. Buddypress-default works okay.Then I uploaded bp-social theme and its child theme folder and activated the child. But I got a blank page on the home page. I tried to activate the parent. Again Blank page. Buddypress default theme is working on switching back to default. I deleted the bp-social child completely. But blank page on activating parent of SOCIAL.
The Social Theme folders were:
wp-content/themes/bp-social
wp-content/themes/bp-social-child

I don't know where to look for an error log