Form Builder form won't send email
I created a Form Builder form for a 'contact us' page, then copied that form for a 'career opportunities' page. Some of the form elements were deleted, plus a WA dynamic checkbox was added with validation. I deleted the UE server behavior instance from the old page and added new: 'blank_2.php. I then opened the old UE 'blank' page, edited and saved as 'blank_2' for the new page.
The form won't submit. I deleted the checkbox with validation, thinking it could be a validation error, but still not sending. Also changed the trigger to the submit button name, but still nothing.