Error When Using Mobile App Builder

I am attempting to create a basic mobile app (I am completely new to Sitefinity):

1) From Mobile App Builder page, clicked Create an App button.

2) Entered a name and chose a module and icon.

3) Logged into my Telerik account and clicked "Send to Appbuilder."
4) Saw the error message "Cannot perform runtime binding on a null reference".

This seemed to be a simple process -- I have not yet even gotten into the developer side of things.  We are currently in the process of evaluating mobile options, so this is a significant piece of functionality to not have working...