Seems to be a common problem, that the social icons (in the header, in the footer and at posts) are not displayed correctly in some browsers (Firefox - showing squares with digits, Safari - showing nothing, Opera - showing just squares). In Chrome all is working fine.
Tried several methods I’ve found in the forum.
• adding some lines to the functions.php of the pro-child theme
add_action ('init', function(){
header("Access-Control-Allow-Origin: *");
});
• adding some lines to the .htaccess
<IfModule mod_headers.c>
Header set Access-Control-Allow-Origin "*"
</IfModule>
None of these worked. Any further ideas?