Hello, Jean!
Sorry for the late reply, your post was marked as spam (was hidden) so I missed it.
If you still have this problem, 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;
}
Please let me know if this helped you.
Best Regards