Plex-Binding throws errors

Hello

After upgrading to the newest Versions the legacy plex binding throws many errors into the openhab.log, but it works.

The error entry is

2017-01-17 20:50:55.450 [ERROR] [.binding.plex.internal.PlexConnector] - Error mapping JSON
org.codehaus.jackson.map.JsonMappingException: Root name ‘_elementType’ does not match expected (‘NotificationContainer’) for type [simple type, class org.openhab.binding.plex.internal.communication.websocket.NotificationContainer]
at [Source: java.io.StringReader@97d77e; line: 1, column: 2]
at org.codehaus.jackson.map.JsonMappingException.from(JsonMappingException.java:163)
at org.codehaus.jackson.map.ObjectMapper._unwrapAndDeserialize(ObjectMapper.java:2787)[176:org.openhab.core.compat1x:2.0.0.201701141030]
at org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.java:2721)[176:org.openhab.core.compat1x:2.0.0.201701141030]
at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1854)[176:org.openhab.core.compat1x:2.0.0.201701141030]
at org.openhab.binding.plex.internal.PlexConnector$PlexWebSocketListener.getSessionUpdateFrom(PlexConnector.java:562)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.openhab.binding.plex.internal.PlexConnector$PlexWebSocketListener.onMessage(PlexConnector.java:533)[215:org.openhab.binding.plex:1.9.0.201701150210]
at com.ning.http.client.providers.netty.NettyWebSocket.onTextFragment(NettyWebSocket.java:202)[215:org.openhab.binding.plex:1.9.0.201701150210]
at com.ning.http.client.providers.netty.NettyAsyncHttpProvider$WebSocketProtocol.handle(NettyAsyncHttpProvider.java:2380)[215:org.openhab.binding.plex:1.9.0.201701150210]
at com.ning.http.client.providers.netty.NettyAsyncHttpProvider.messageReceived(NettyAsyncHttpProvider.java:1220)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:536)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:435)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:318)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)[215:org.openhab.binding.plex:1.9.0.201701150210]
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)[215:org.openhab.binding.plex:1.9.0.201701150210]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_111]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_111]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_111]

Any Ideas?

OH is at #722, Plexbinding is 1.9.0

Thank you

Michael