Topic on Extension talk:JSON/Flow

I stalled the extension, but when I paste the example JSON (shown below) I get an error: "JSON format error". Are there any known conflicts?

Example code used: {{#json: { "name" : "John", "address" : { "city" : "Boston", } } }}

The error can be seen here http://businessmodelproject.com/w/User:Chris_Garner/sandbox

My setup is listed here http://businessmodelproject.com/w/Special:Version