Hi Russ,
Here is the group I created:
ArcGIS Collector Support & Testing - WADNR - You have been invited to join!
The only caveat is that my users were only able to generate the message some of the time and they tried filling in different parts of the form - there was no pattern regarding a missing "WAYPOINT_NAME" and an error or any of the attributes in combination. Hopefully, you are able to generate this error message as well. Also, this occurred when my users were in cached mode.
Thanks!
Kirk