Hello, Claire!
If your website worked properly before the update, then you probably have incompatibility plugins with the PHP version you currently have.
So first, I suggest you check the compatibility of your active plugins.
To do this, temporarily deactivate all active plugins and check the pages. If the fonts are working now, try to activate the plugins one by one until the problem reoccurs again. On that way, you can find the problematic plugin(s) if any.
If that doesn’t work, try the following:
Insert the next code into
Customizing->General->Additional CSS:
#masthead .site-title a {
font-family: Quicksand!important;
}
body.page h1.entry-title {
font-family: Raleway!important;
}
2. Try the next:
Go to the Customizing-> General-> Extra menu and make sure “FontAwesome” is enabled.
https://prnt.sc/npohpw
If it is enabled, and you still have the problem, insert the next code into
Customizing->General->Additional CSS:
.fa {
font-family: FontAwesome !important;
}
Best Regards