I get a login error with the Android Box app

Dear BOX Support, As the title says, I get a login error when I try to log in on Android. I can log in without any problems from Windows or a browser. I have two-step authentication set up, and when I enter a 6-digit number to log in, it takes a long time, and eventually it times out and I get an error message like "Contact your administrator to approve this device." I haven't used Box on Android for the past few months, but it was working fine before that. Just to be sure, I reinstalled it from Google Play and tried again, but I still had the same problem. *The language in my country is Japanese, so I'm using a translation. Sorry if the text is a little strange.