Recently my phone broke and since i had my security key on there i had to remove it in order to play the game. i have just got it fixed and uninstalled the security key app then reinstalled it and attempted to set up a mobile security code, when i entered the serial code all went well. i made sure i entered it correctly but when it started displaying the changing security code i entered it into the correct box and when i clicked "save" and it just said that "we could not find your serial number" I've no idea what is going on I've re-installed the app several times and it has not worked at all

 

any information would be much appreciated

I just tried logging into my account and was eventually forced to remove the security key and when trying to reinstalling it i received the same message. It says it has something to do with the app being created for an older version of android. I recently bought a new phone. Edited October 22, 2020 by Vasilos