I have been using Music Fab without any issues for several months now. There have been no changes whatsoever to my software environment.
I can play music tracks via the Music Fab browser without a problem, and the green “Analyze” button is visible; it simply cannot be clicked. Since I use Music Fab daily, I can also state with certainty that changes were made to the template here in Germany during the night of August 3rd to 4th.
I don’t use the app, and I never have. However, I don’t see any connection there, since all the Amazon functions are working fine.
It might be interesting to hear from a German user whether the problem exists there as well.