Missing one arrow icon from Getwid block

Hello,

I’ve used 3 Getwid arrow icons to help users navigate through my site easily. They are really useful, thanks. Unfortunately, suddenly, one of the icon disapparead.
That one: https://fontawesome.com/v4.7/icon/reply

When I modify the pages, I can see it in the editor perfectly, but when I update and check online, it is not there. I’ve checked on mobile, computers, friends’ too, the arrow is never there. When I inspect the code, it does seem correct as it says “class=”fas fa-reply”.

I’ve tried to put another arrow, then put back the one I want and save, but it never shows up online.

Best regards
Esteryn

The page I need help with: [log in to see the link]