I have a button on my sail form that generates the pink alert "An error was

I have a button on my sail form that generates the pink alert "An error was encountered while processing your request" and the following error when selected:
ERROR com.appiancorp.rest.shared.FallbackExceptionMapper - Internal Server Error on REST API invocation.
21:16:28,165 INFO [stdout] (ajp-/0.0.0.0:8009-20) java.util.NoSuchElementException: JSONObject["choices"] not found.

This is a brand new SAIL form in a new process model. I do not reference any named 'choices' in my processes and sail form. As anyone else ever send this error? Any suggestion is welcome and I have attached the entire stack trace.

taskFromButtonErrorStackTrace.txt

OriginalPostID-146182

OriginalPostID-146182

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