User reported this error. Has anyone seen this?
only one reference to error 1000 Cannot submit survey results because of a "Code 1000" error probably not much help but it exists
Error 1000 typically comes from the data being entered being too big for the field, such as by exceeding a length enforced by the bind::esri:FieldLength column.
The description given by the message doesn't sound exactly like that, but start by checking what you're trying to enter into that field against what the form demands of it.
Just confirmed, this is in fact an entirely different error that happens to have the same error code. The same things don't cause it.