GridMarket single-post pages are broken

Running WPMU/BP.
MarketPress Network Activated.

Installed FrameMarket theme, and enable GridMarket on a subblog. Everything is stock so far, Gridmarket is activated on the blog.

<strike>Main Page is identical to mydomain/store, and the store page does not display any of the content input into the textbox when editing it.Still have the default text present for the Store page content.</strike> I was doing something wrong.

Also, when visiting an existing blog post I get an error (see screenshot) and it kill the buddybar at the top of the screen (note in the screenshot that the bar is not present).

Also, blogs and stores can exist on the same website using gridmarket/framemarket, correct?