@patrick This is happening to me as well. It appears to happen when there is a space at the beginning or end of the value for the tag-text runtime element.
@bpj and @mebeingken, could you see if that is the cause for you?
As an example, the First Name has a space at the end. If I remove it, then the form submits successfully. If I add it back it gets the error. I've validated with multiple records and this happened consistently.
