No idea what Open Pass is but I couldnt use the app because I dont have an account
NEXON Company
Sunday, April 7, 2024
Hello, JL! Open Pass Key allows you to access the app with the same information on other devices. You can copy the numerical serial number found in [Settings → Open Pass Key] then enter it in [Settings → Continue with the Existing Account]. If the issue persists, you may contact our CS Team for further assistance.
CS Link: https://nexon.link/dxd