In case you have problem with logging in to your Google Music Account or you see all the time Loading playlists... information in desktop app, please follow these steps.
On the bottom of the screen you have link Activate premium!. Open it and and click on I have premium key
Remember to paste license without any whitespace characters!
Please try to go to
Settings -> Privacy -> Media Library and make sure Stamp is checked.
If this wont help then can you go to Music app, sign out of Apple Music, sign in again, then
Settings -> Music -> Enable iCloud Music Library again.
Moving to Apple Music is supported since iOS 9.3. So please make sure you have at least iOS 9.3
Please go to
Settings -> Privacy and allow all apps to be downloaded from anywhere, please see attached screenshot.
At the success screen where you see number of exported songs, on bottom right corner please click on the button to export failed tracks as csv file.
You can use our iOS app on different Apple devices provided they share the same Apple ID.