SOLVED: Registering User Causes Error for One App and Not Another in iOS

I am working on adding Backendless to an existing project. I have created two apps on the Backendless console. If I use the App ID and Secret key for one, the app runs and a user is created. If I use the App ID and Secret Key for the second app I crash with the following error message. Just FYI, I used the sample code from the getting started guide. Any help would be appreciated.
Take care,
Jon

Terminating app due to uncaught exception of class 'Fault'
libc++abi.dylib: terminating with uncaught exception of type Fault
(lldb) 

I just realized the original app was modified to require a username. The sample code does not have a user name. Once this requirement was removed, the error went away.