Contact forms with conditional fields suddenly disappeared

Hi,

After a year, suddenly the contact forms on my website that has conditional fields just disappeared, with only the “submit” button visible.

They are on these 2 pages:

https://sornthaioptometrists.com/en/make-an-appointment/

https://sornthaioptometrists.com/make-an-appointment/

The contact forms WITHOUT conditional fields work fine: https://sornthaioptometrists.com/en/student-eyecare-program-for-educators/

Please help

The page I need help with: [log in to see the link]