I'd like to take the 2 column template, clone it and add a widget that only shows when using that template. I have tried the method outlined at: https://premium.wpmudev.org/blog/how-to-widgetize-a-page-post-header-or-any-other-template-in-wordpress/ but all I get is a blank screen. BP Social looks like it uses a different method for widgets.
I guess I don't understand how the theme knows which template it's supposed to put a specific widget on. Can someome give me a basic rundown on adding widgets to the BP Social template, or point me to some documentation or examples specific to the template?