Launcher Error [30426][19900][1392]

Greetings fellow Eorzean,

This error is usually associated with interference of the game's data, or a connection issue. Here are some recommended troubleshooting steps that might help with alleviating this issue:

Open the control panel of the PC and 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.
- Please RESTART your PC now. Once your PC has been restarted, Right-Click the FFXIV launcher icon once more and select "Run as Administrator"

2. Please make sure that all background applications (including anti-virus programs) have been disabled or closed to minimize game interference when logging in.

3. Lastly, check to see if the following port ranges have been opened on your router. If not, you may contact your ISP and request they open them for you:
▼TCP
54992 through 54994,
55006 through 55007,
55021 through 55040

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