Hello Adesunkanmi,
Thanks for reaching out to the Apple Support Communities! Welcome to Apple Music! As a new subscriber I'm happy to provide you with some resources to help you get started, and steps to take to resolve the message you're seeing.
If you're still receiving a message when you're trying to add music to the Library, follow these steps:
1 - Restart the Apple Music app.
Select Apps > Settings > Apps > Apple Music > Force Stop > if you see a message, "If you force stop an app, it may misbehave," tap OK > Return to the Home screen.
2 - Restart your Android device.
3 - Launch Apple Music.
Follow the steps in this article to Add and download music from Apple Music or buy music from the iTunes Store. You'll follow the steps under the, "On your iPhone, iPad, iPod touch, or Android device," section.
This article will give you some additional details about what you can do with Apple Music on Android: Use Apple Music with your Android devices.
All the best.