I found one fix, and I hope that this helps some of you.

I'm accessing from PC(Windows 10) and I play through Steam.
Instead of launching through Steam, I launched from the Steam folder (C: > Program Files (x86) > Steam > steamapps > common > FINAL FANTASY XIV Online > boot)...
ffxivboot.exe does not work and produces the same problem as if I were launching through Steam. However, ffxivboot64.exe worked perfectly for me.

Good luck everyone ):