Issue is still on-going on my end.

It's completely mad that we're expected to download 5 different VPNs and obscure apps just to troubleshoot. Major kudos to everyone posting fixes but this does not absolve Square Enix of the responsibility fix their launcher or at least provide an alternate method of downloading the patch files. The same issue has popped up in 5.1 and 5.11. Are we expected to sign up for VPNs every time a patch goes live? We'll run out of free trials quick, especially considering there's no guarantee a VPN will work even if we download it.