DataTable response and string not loading from appspot

[Derek Sheppard]

I've got a test feed set up, but both DataTable options fail to load and show a 500 error in the console. 

EX: Works: https://analytics-embed.appspot.com/query?id=ahFzfmFuYWx5dGljcy1lbWJlZHIVCxIIQXBpUXVlcnkYgICAgPjChAoM&format=json

       Error: https://analytics-embed.appspot.com/query?id=ahFzfmFuYWx5dGljcy1lbWJlZHIVCxIIQXBpUXVlcnkYgICAgPjChAoM&format=data-table-response

Anybody else having this problem? Could it be a SuperProxy issue, or something specific to appspot? Thanks.