A new client patch was released to resolve the issue where in certain situations, accessing the Pearl Store and Customization windows when playing as a Kunoichi could cause the game to abnormally close. 

We apologize for the issues caused.  

Adventurers,
We have discovered an issue where in certain situations, accessing the Pearl Store and Customization windows when playing as a Kunoichi could cause the game to abnormally close. We are currently investigating the issue and will inform you through this notice when the issue has been resolved.

We are very sorry for the inconvenience caused,

Thank you