Auto play in JustinGuitar app still not working

@MusopiaApps okay I have been trying what you suggested for the last three hours and still not working. Here is what I did.

I I logged out of the app, then deleted the app on both my iPad and iPhone , I reinstalled the app to my iPad ( it didn’t install like a new app it was still I the cloud) I also cleared the history in safari. I did this four times, I also played 15 song and never got the option to try the new karaoke mode. Not sure what to do next.

Regards
Adrien