I found an issue where the Login client will crash without any error message after entering your user name and password (and/or one-time-password), then click play.

I have this issue resolved, I just wanted you to be aware that no error is thrown and windows attempts to 'find a solution'. lol.


It appears this issue is correlated to the email being sent:
[Square Enix Account] Notification Regarding Login Restriction

If you do not reset your password, and attempt to log in, the client will crash without warning. However, upon resetting my password following the links in the email, and logging into the game. The client does not crash and login is successful.