Hi @tuanphan, I'm having the same problem. I've sent a ticket to Squarespace but still no resolution yet.
The form itself is functioning just fine, but the button remains invisible even with the suggested css code.
It's probably also worth noting that when "lightbox" is unchecked, the form is visible, but when "lightbox" is checked, the entire form section disappears when in edit mode? Screenshots attached for reference.
The page url is: https://www.touch-dubai.com/sign-up
Thanks in advance for any assistance you can offer.
Jake
