Hey Liesl,
Thank you! I'm glad you like the app! :)
Adding the field itself should not break the application. However, some modifications you make inside the code to add support for those fields can break the app.
Unfortunately, I cannot help you much with the code you have added and I would recommend you to go through the Developer Guide article and enable debug so you can see the errors on the screen and figure out what is causing the issue.
Regards,
Milos
Hey Liesl,
Since I haven't received any response for while now, I guess that you have resolved the issue so I'll close this ticket.
If you have any other questions, feel free to open a new ticket.
Kind regards,
Milos Stojanovic