Greetings adventurer,

I'm sorry to hear about these constant 90002 errors that you have been experiencing. Have you tried switching between a wired connection and wireless connection to see if you notice a difference in either? Additionally, I would also recommend trying the following connection troubleshooting as it might help with this:

1. Please try disabling/closing any background applications, including anti-virus programs, to minimize the chances of another program interfering with the game.

2. In the Control Panel, please go to ‘Network and Internet’. Once there select ‘Internet Options’
- Under the "General" tab, please delete ALL browser history.
- Under the "Security" tab, please move the slider to the lowest possible settings or no higher than "Medium"
- Under the "Privacy" tab, click “Advanced” and select ‘Accept’ under both First Party and Third Party Cookies.
- Under the "Advanced" tab, please make sure that "Allow software to run or install even if signature is invalid" is CHECKED.
- Make sure that all SSL and TLS (EXCEPT SSL 3.0) are CHECKED. [SSL 3.0 should be UNCHECKED]
- Hit "Apply" to save the settings, and then "OK, to close the Internet Options menu.
- Right-Click on the FFXIV launcher icon and select "Properties"
- Hit "Apply", then "OK" to save the changes.
Once done, please RESTART your PC after.

3. Right-click the FINAL FANTASY XIV launcher icon, and select the option to "Run as Administrator".

I hope this helps! Thank you for posting in the FINAL FANTASY XIV Technical Support Forums.