The Flic Twist was delivered today and I tested it right away.
The MusicCast volume control works perfectly with it.
@rob.loosx Thank you very much for the script 
Best posts made by Wolf
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RE: Yamaha MusicCast control with FlicTwistposted in Flic Hub SDK
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RE: Have Flic buttons been affected by the AWS outage?posted in General Discussion
I had the same problem.
I deactivated and reactivated the Flic Alexa Skill.
Now everything works fine again.