Many fake "Apple Music IPAs" ask you to enter your Apple ID and password "to verify the purchase." This is a phishing scam. Once entered, hackers can:
Installing an older version of Apple Music if a newer update is incompatible with a device or contains bugs. Modifications: Apple Music Ipa Download
Installing the app in environments where the official App Store is unavailable. Many fake "Apple Music IPAs" ask you to
One of the biggest draws of a cracked IPA is "unlimited offline downloads." But you can achieve offline listening legally without paying full price: Apple Music Ipa Download
This usually indicates a compatibility issue between the specific IPA version and your current iOS version. Try downloading a different version of the IPA.
Drag and drop your downloaded file into the Sideloadly window.