ERROR 90000

[Haleir]

Hello forums! It's a shame my inaugural post is technical problems, but here goes.

I am frequently experiencing error 90000. It happens wantonly and without regard to what I was I doing in game at the time, here is what I have noted:

- It seemed do be more prominent during peak time on Friday evening, disconnecting every 2 to 7 minutes. (roughly)
- Playing later into the night, I found myself able to play without experiencing disconnect issues.
- Now today (Saturday) the problem is back as bad ever. Error 90000 all over the place.

During this issue, I was able to:
-- Stay connected to Ventillo with ping between 31 and 47
-- Stay connected to Steam
-- Stream a video playlist from YouTube in 1080p without waiting for buffering

I have attempted the following solutions to fix this error, none were successful:
-- Resetting my router with a power cycle.
-- Looking for a router firmware update.
-- Forwarding FFXIV's ports.
-- Using a VPN (I know some have reported this as a solution, thinking that ISPs throttling FFXIV's traffic was the issue, it didn't work for me.)

I'm in Texas USA on Grande Communications as my ISP.

Here's hoping SE can figure out a fix.