It's been a month at least that asking to read a book does not work anymore. It starts reading but after a certain amount of time (it depends on the book and chapter) Sonos stops saying "song not encoded correctly" access denied. I tried this in 2 completely different systems, different accounts and different homes, and the problem is exactly the same.
The problem is about Sonos speakers, in Italy, with Audible. Other services work as normal.
I ask other Italians in these forums to let Sonos know about this problem.