Board Thread:Love Live! School Idol Festival Lounge/@comment-31196573-20170131131820

Hello, I've been playing Love Live on EN with no issues for about 2months, then a friend gave me her old JP account which I got to play on for months (and the install process was really smooth, just had to get the apk, install it, launch the app and wait for the data to download.) but then, when I reseted my phone device, I suddenly couldn't launch the app anymore using downloaded apks from both https://ll.idolactiviti.es/apk/ and apk pure :(

The error message displayed is the following:

I hope you guys know this error and can help me :(

 