When navigating the 'browse' tab, I keep stucked with a white popup after I try to use the feature 'Add to library'. This is happening for both playlists, albums and songs.
MacBook Pro 13”, macOS 10.14
There seems to be a current issue for Apple Music users in both Mac & Windows where there should be new terms and conditions presented for you to agree to, but the dialog doesn't fully load. Try adding some music to your iCloud Music Library on an iOS device and it should work, after which Apple Music should work everywhere. Others have had success after rebooting their Mac into safe mode, but it didn't work for me. If you cannot fix it yourself contact iTunes - Official Apple Support and see if they can help.
tt2
There seems to be a current issue for Apple Music users in both Mac & Windows where there should be new terms and conditions presented for you to agree to, but the dialog doesn't fully load. Try adding some music to your iCloud Music Library on an iOS device and it should work, after which Apple Music should work everywhere. Others have had success after rebooting their Mac into safe mode, but it didn't work for me. If you cannot fix it yourself contact iTunes - Official Apple Support and see if they can help.
tt2
This user showed me this solution, it worked for me I hope it's the same with you...
Can no more add songs from Apple Music to iTunes
