I can fix it by changing a Text Input that is set to Mandatory, Numeric, Max Chars 9. Either by turning off Mandatory or changing the Max Char to 15 or if we use 6 digits max in that field. This is the strangest issue I have had with a form. I have 3 computers that get this error but the form works fine on other machines without having to make the fore mentioned changes.
If you submit a support inquiry and attach the form in question I will review it for you. Please specify which field it is and provide more detail. I am not following the scenario or problem. Support ticket: /help-center/support-inquiry/