Thanks for reaching out Beruang Ndut,
It sounds like you're having some trouble using some services after turning on Security Keys. We can help.
While security Keys are a great way to protect yourself from targeted attacks, they are not needed in every situation. If you do choose to use them, be aware of the following limitations:
What doesn't work with Security Keys for Apple ID
* You can't sign in to iCloud for Windows.
* You can't sign in to older devices that can't be updated to a software version that supports security keys.
* Child accounts and Managed Apple IDs aren't supported.
* Apple Watches that are paired with a family member's iPhone aren't supported. To use security keys, first set up your watch with your own iPhone.
Since Apple Music connects using iCloud, this may be unavailable while this level of security is enabled. You can disable this security feature and try using Apple Music to see if there is any improvement.
You can check out this article to learn more About Security Keys for Apple ID.
Hope that helps.
Take care.