Hi @alexander
The font issue is now fixed!
But now there are many new issues, possibly caused by a same problem.
I have created a Video with a button that is supposed to look like this on the front end:
After updating to RC1, it now looks like this:

Also, when I edit the Homepage in Cornerstone, it is all messed up.
Also, inside Cornerstone, the interactions on the CSS Grid on the Homepage are partly working.
Also, paddings on the green section are larger, plus the Quote element still has the borders:
Original:
Staging with RC:
It seems like both Element CSS and Effects are not working.
Thanks!
If you need to install patches to the staging server, there is no problem. The other subdomain is a reference point for how the original should look like.