Error occured while executing on user input script

Error occured while executing on user input script

Error details:
Error occured while executing on user input script.
Unable to update variable
family.Parents_Guardians is null
family is null

This was working just fine a few days ago. Why am I getting an error now?

I've shared the application to support so you can see it for yourself.

It is critical that this application be working properly today.

Thank you.