Can not add additional fields after Word Press 4.5

I already have two additional fields added for my appointments plus one that is in functions.php see script below adding "I Accept the Privacy Policy"
The words Privacy Policy link to the Privacy Page" This all works ok.

I now want to add an additional field "Device Pass Code" Text Required
Click on ADD nothing happens.

Theme developer has resolved Jquery problem I had with Appointment Time not working.
This may be the same thing as it used to work prior to version 4.5 of Word Press.