A few days ago, I upgraded my mobile facebook app to the 2.0.50 version. After the required reboot, I opened the app and it went to the log in page. I entered my name and current password but when I attempted to log in, an error message appears with code number 2406 and I immediately receive a text message in chinese. I am unable to log in with the correct information. I have re-installed the app twice and I'm still having the same issues.