I can’t accept my Apple Music invitation it keeps taking me to the iCloud website

Hello S-BAG,

Thanks for visiting Apple Support Communities. If we understand correctly, you're not able to accept your invitation to join a family group from the email invitation you received. If this is right, are you able to use your device settings to do that? If you're on an iOS device, tap Settings > [your name] > Invitations. Those steps, and others can be found under "Join a family group" here: Set up Family Sharing

Keep us posted.

Take care.