First, make sure to use proper code fencing when pasting configs and logs. It makes it very hard to read your issue.
Secondly, the logs you provided are related to the Amazon Echo Control binding which is not related to the Alexa skill.
Last, make sure to go over the regional availability matrix. Some capabilities are only available in specific languages. Relevant to your issue, the PlaybackController capability is not available for the Italian locale as of yet unfortunately. I would have expected that the Alexa’s response to your voice request should have indicated that the command couldn’t be fulfilled.