[JSON error -- looking for help]

Trying out Data Merge for the first time in Publisher. I checked my JSON code with an online validator to confirm its syntax but Publisher keeps giving me this error when I try to upload my file...

Error parsing JSON file:
in Json::Value::operator[](ArrayIndex): requires arrayValue

Does Publisher not accept JSON with blank arrays? Is that what this is saying?

[Call for Camera Images]

The dropbox link gives me privacy warnings in my browsers. Is Dropbox's SSL certificate no good anymore? 

Also would be helpful if there was a running list to the camera samples you have up to date.