Kodi and alexa skill

I just setup kodi bindngs and everything works fine.
home.sitemap
Frame label=“Sala”
{
Switch item=L_SALA
Switch item=C_SALA
Group item=Kodi
}

and in home.items
//Group Kodi
String test_player_title “Now Playing [%s]” (Kodi) { channel=“kodi:kodi:1a036c0b:title”,alexa=“PlaybackController.playback” }
Player test_player “Registratore” (Kodi)
Dimmer test_player_volume “Volume [%.1f %%]” (Kodi) { channel=“kodi:kodi:1a036c0b:volume” }

Everything works fine.
so i changed the line about player:
Player test_player “Registratore” (Kodi) {alexa=“PlaybackController.playback”}

alexa app detect a new device.
But if i say “alexa registratore pausa” (i use skill in italian)
nothing happen and in log i get this but i dont kow if is related:
2020-04-14 23:46:19.695 [WARN ] [trol.internal.handler.AccountHandler] - handling of websockets fails
org.openhab.binding.amazonechocontrol.internal.HttpException: GET url ‘https://alexa.amazon.it/api/activities?startTime=1386907079410&size=10&offset=1’ failed: Bad Request
at org.openhab.binding.amazonechocontrol.internal.Connection.makeRequest(Connection.java:648) ~[bundleFile:?]
at org.openhab.binding.amazonechocontrol.internal.Connection.makeRequestAndReturnString(Connection.java:500) ~[bundleFile:?]
at org.openhab.binding.amazonechocontrol.internal.Connection.makeRequestAndReturnString(Connection.java:495) ~[bundleFile:?]
at org.openhab.binding.amazonechocontrol.internal.Connection.getActivities(Connection.java:945) ~[bundleFile:?]
at org.openhab.binding.amazonechocontrol.internal.handler.AccountHandler.handlePushActivity(AccountHandler.java:777) ~[bundleFile:?]
at org.openhab.binding.amazonechocontrol.internal.handler.AccountHandler.handleWebsocketCommand(AccountHandler.java:722) ~[bundleFile:?]
at org.openhab.binding.amazonechocontrol.internal.handler.AccountHandler.webSocketCommandReceived(AccountHandler.java:710) [bundleFile:?]
at org.openhab.binding.amazonechocontrol.internal.WebSocketConnection$Listener.onWebSocketBinary(WebSocketConnection.java:406) [bundleFile:?]
at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onBinaryMessage(JettyListenerEventDriver.java:103) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.message.SimpleBinaryMessage.messageComplete(SimpleBinaryMessage.java:68) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.appendMessage(AbstractEventDriver.java:65) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onBinaryFrame(JettyListenerEventDriver.java:74) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.incomingFrame(AbstractEventDriver.java:145) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.WebSocketSession.incomingFrame(WebSocketSession.java:321) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.extensions.ExtensionStack.incomingFrame(ExtensionStack.java:202) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.Parser.notifyFrame(Parser.java:226) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.Parser.parseSingleFrame(Parser.java:262) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.readParse(AbstractWebSocketConnection.java:582) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onFillable(AbstractWebSocketConnection.java:441) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onFillable(AbstractWebSocketConnection.java:428) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:426) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:320) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:158) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:367) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:782) [bundleFile:9.4.20.v20190813]
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:918) [bundleFile:9.4.20.v20190813]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]

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.