Custom Button Font CSS No Longer Working

Site URL: https://www.certaretutoring.com

Hi! I created my site back in May with custom CSS so my buttons would have a custom font. Now suddenly all the custom fonts on the sites are working except for the buttons. 

Here is the code for the "Let's Talk" section as an example:
 

section[data-section-id="6263679d83150d69374c24e0"]
{
  h2{font-family: 'Famosa-Heavy';}
  p{font-family: 'CreteRound-Regular';}
  .sqs-block-button-element{font-family: 'Smoothy-Sans';}
}

Is there a new syntax for changing buttons fonts now?

Thank you for you help! 

Replace this code

.sqs-block-button-element{font-family: 'Smoothy-Sans';}

with this

.button-block * {font-family: 'Smoothy-Sans' !important;}