I've done the following things to try to resolve this, with no solution:
- Setting frontier and sqex.to as whitelist on IE and FF
- Whitelisted in AV
- Turned off Firewall, as well as turned off AV
- Restarted computer and modem
- Attempted under a new IP
- Updated all drivers
- Updated all browsers
- Run launcher in admin
- Edited launcher tool doc numbers from 0s to 1s where they were needed by countless other threads on here and reddit
- Tried safety mode on my laptop in order to build up the proper files
- Tried to use google and SAFEDNS, DNS's instead of auto detect
- Made sure IE has “ Automatically Detect Settings” checked
- IP flushed through system
- Cleaned out cookies, temp files, etc. on both FF and IE
Only things I have yet to really try:
- Starting launcher with a different ISP
- Using a VPN
- Turning phone into a hotspot
- Contacting SE and AT&T (this I plan to do soon)
Everything but FFXIV related things works. My phone won't load FFXIV forms, and has issues loading the lodestone/mogstation. I was able to log on the day before yesterday, but only after I spent nearly an hour spamming the launcher with the "system error" popping up. I however was unable to log in yesterday, which caused the uninstall.